not born yesterday Definition

born
adj

1. Brought into being by birth.

Example: five children born on the same day
2. Having a specified quality or ability as a natural attribute.

Example: a born leader
3. Destined to do it.

Example: born to lead men
Form: born to something
4. Having a specified status by birth.

Example: Scots-born
Example: freeborn

verb

1. Past participle of bear¹.

Idiom: in all one's born days

colloq
In all one's lifetime or experience.

Idiom: not born yesterday

Alert; shrewd; not naive or foolish.

Info:

These words are often confused with each other.