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born yesterday

Extremely naïve, gullible, or unintelligent, like a newborn baby. Almost always used in the negative or as a rhetorical question. Don't think you can fool me with that old ruse, I wasn't born yesterday, you know. Of course I know that major political issues can't be fixed overnight. Do you think I was born yesterday?
See also: born, yesterday

yesterday's man/woman

Someone who has passed the pinnacle of their career. Bob is never going to give up his cushy job—he's yesterday's man, and his next career move is retirement!
See also: man, woman

be born yesterday

To be naïve or easily deceived. Often used in the phrase "I wasn't born yesterday." Oh, you expect me to believe that you've been in your room all night and didn't just sneak in the house a few minutes ago? Well, I wasn't born yesterday—and I heard the door open! Do you think I was born yesterday? There's no way that email isn't a scam!
See also: born, yesterday

I wasn't born yesterday

I am not extremely naïve, gullible, or unintelligent. When one is referred to as "born yesterday," they are being likened to a newborn baby, who has no experience with the world. Don't think you can fool me with that old ruse. I wasn't born yesterday, you know. Of course I know that major political issues can't be fixed overnight. I wasn't born yesterday.
See also: born, yesterday

yesterday's news

Someone or something that is no longer receiving or worthy of public interest, importance, or influence. I don't know why you're still campaigning for that hack—he's yesterday's news. The once-prominent social media platform is now yesterday's news among a new generation of smartphone users.
See also: news

a week tomorrow/on (some day)/etc.

One week from the day specified. Primarily heard in UK. I'm flying to Ireland a week on Saturday for my brother's wedding. We need that report finished a week tomorrow.
See also: on, tomorrow, week

a week yesterday/last (some day)/etc.

One week before the day specified. They only gave me the assignment a week yesterday, so I'm really stressed out about getting it finished by tomorrow. Chris left on his work trip a week last Tuesday.
See also: last, week, yesterday

not born yesterday

Not naïve or inexperienced; knowledgeable, intelligent, or shrewd. Don't think you can fool me with that old ruse—I wasn't born yesterday, you know. I know you think Mom is clueless about these things, but she wasn't born yesterday.
See also: born, not, yesterday

a week yesterday

A week and a day before today. I last saw Stu a week yesterday, before he left on vacation.
See also: week, yesterday

need (something) yesterday

To need, require, or desire something very urgently or as soon as possible. James, I need those expense reports yesterday! We can't start the meeting without them! I had a look at your car. Its engine needs a total overhaul, like, yesterday.
See also: need, yesterday

I need it yesterday.

Inf. an answer to the question "When do you need this?" (Indicates that the need is urgent.) Bob: When do you need that urgent survey? Bill: I need it yesterday. Mary: Where's the Wilson contract? Sue: Do you need it now? Mary: I need it yesterday! Where is it?
See also: need, yesterday

need something yesterday

Inf. to require something in a very big hurry. Yes, I'm in a hurry! I need it yesterday! When do I need it? Now! Now! No, I need it yesterday!
See also: need, yesterday

not born yesterday

Fig. experienced; knowledgeable in the ways of the world. I know what's going on. I wasn't born yesterday. Sally knows the score. She wasn't born yesterday.
See also: born, not, yesterday

Yesterday wouldn't be too soon.

Immediately.; Right away. (An answer to the question "When do you want this?") Mary: Mr. Franklin, when do you want this? Fred: Well, yesterday wouldn't be too soon. Alice: When am I supposed to have this finished? Sue: Yesterday wouldn't be too soon.
See also: soon, yesterday

not born yesterday

More experienced and less naive than one appears to be, as in Don't think you can fool me; I wasn't born yesterday. This term gained currency from the title of Garson Kanin's popular Broadway play, Born Yesterday, which was made into an even more popular film. In both, Judy Holliday played a stereotypical dumb blonde who shows more common sense than her sophisticated acquaintances. [Early 1800s]
See also: born, not, yesterday

not born yesterday

If you say that someone wasn't born yesterday you mean that they have enough experience to not be easily tricked. Listen, I wasn't born yesterday. This looks like a work of fiction to me. Note: This expression is often varied. For instance, you can say that someone must think you were born yesterday if they treat you as if you are stupid. They must think I was born yesterday if they think I'd fall for a trick like that.
See also: born, not, yesterday

I wasn't born yesterday

used to indicate that you are not foolish or gullible.
See also: born, yesterday

yesterday's man

a man, especially a politician, whose career is finished or past its peak.
See also: man

yesterday's news

a person or thing that is no longer of interest.
See also: news

I wasn’t born ˈyesterday

(spoken) used to say that you are not stupid enough to believe what somebody is telling you: You don’t expect me to believe that, do you? I wasn’t born yesterday, you know.
See also: born, yesterday

a ˌweek ˈyesterday, last ˈMonday, etc.

(especially British English) seven days before the day that you mention: It was a week yesterday that we heard the news.
See also: last, week

born yesterday

Naive or ignorant. Used in negative constructions: Of course I can use a computer; I wasn't born yesterday.
See also: born, yesterday

born yesterday, not (I wasn't)

Not naive; more experienced than one might think. Already a popular saying by the early nineteenth century, it appeared on both sides of the Atlanti “I warn’t born yesterday,” said Thomas Haliburton’s Sam Slick in one of his Wise Saws (1843). Approximately a century later Garson Kanin used the phrase for the title of a Broadway play that became extremely popular, as did the later (1950) film version. In both, actress Judy Holliday played the quintessential dumb blonde who, despite seeming unsophistication, is graced with enormous good sense.
See also: born, not

so yesterday

Extremely old-fashioned. The “so” in this phrase, which dates from the late 1900s, means “extremely” or “completely.” An article about extending human life indefinitely was headlined “Merely Human? That’s So Yesterday” (New York Times, Ashlee Vance, June 13, 2010). And another, from the Globe and Mail (Montreal), had “The Traditional Job Interview: That’s So Yesterday” (Craig Silverman, April 7, 2008). For an older synonym, see old hat.
See also: yesterday
References in classic literature ?
He said yesterday that no other woman existed for him beside you.
She had her purse in her pocket, with all her money in it,--a bank-note and a sovereign; she had kept it in her pocket from forgetfulness, after going out to make purchases the day before yesterday.
Thank God; I was afraid the same thing as yesterday was beginning again," said Pulcheria Alexandrovna, crossing herself.
Listen, Dounia," he began, gravely and drily, "of course I beg your pardon for yesterday, but I consider it my duty to tell you again that I do not withdraw from my chief point.
It is the same as yesterday again," Pulcheria Alexandrovna cried, mournfully.
It hit 22C in Belfast yesterday and the warm weather is set to continue today and into the weekend - perfect for chilling by the telly.
Supplement elections will be an essential part of national dialogue, His Majesty said yesterday.
yesterday, according to the National Weather Service's Northeast River Forecast Center.
Having proved in the Alps he is the strongest in the mountains, the 2007 champion showed yesterday, on the 40.
It resumed yesterday morning in the early hours, and a body was recovered from the river underneath the bridge at 12.
The midweek Scoop6 was not won yesterday with pounds 10,830 rolling over to today.
Detailed forensic tests on the woman's head, which was discovered by two young sisters yesterday morning, were continuing.
Another soldier died and three were wounded in a separate incident south of the capital, and two more died yesterday from wounds sustained in a bombing on Saturday in which four US servicemen were killed.
United Airlines yesterday unveiled the initial details of its new United First Suite, the signature element of a $165 million upgrade to its international widebody fleet.
The 13-year-old boy was appearing before Birkenhead magistrates today after being charged yesterday evening by police.