I wasn't born yesterday

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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
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

I wasn't born yesterday

used to indicate that you are not foolish or gullible.
See also: born, yesterday
Farlex Partner Idioms Dictionary © Farlex 2017

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
Farlex Partner Idioms Dictionary © Farlex 2017

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
The Dictionary of Clichés by Christine Ammer Copyright © 2013 by Christine Ammer
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