cop on

/kɒp ɒn/

fe’l verb

To stop behaving immaturely; behave, grow up. You'll get in trouble with the boss if you don't cop on.
To come to understand; twig, cotton on

ot noun

Common sense. That idiot has no cop on.

Manbalar: Wiktionary (Free Dictionary API orqali), Datamuse, Tatoeba (CC BY 2.0 FR), MyMemory.