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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?
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!
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!
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.
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?
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!
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.
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.
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]
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.
I wasn't born yesterdayused to indicate that you are not foolish or gullible.
yesterday's mana man, especially a politician, whose career is finished or past its peak.
See also: man
yesterday's newsa 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.
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.
Naive or ignorant. Used in negative constructions: Of course I can use a computer; I wasn't born yesterday.