cop on

Cop a flower pot

[Cockney slang]cop it hot

To get into serious trouble. Suggested by the effect of a flower pot dropped from a window above on to someone below.

cop one's whack

To die.

cop oneself on

to cop on, stop behaving immaturely

cop out

To avoid or shirk, either by failing to perform, or by performing in a grossly insufficient, negligent, or superficial manner.