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]
Words nearby not born yesterday
not anything like,
not at all,
not bad,
not bat an eye,
not be caught dead,
not born yesterday,
not breathe a word,
not built that way,
not by a long shot,
not by any means,
not circuit