knock it off!
STOP IT, cut it out, give it a rest, leave off, pack it in, lay off, give over

[TahlilGaran] Dictionary of Contemporary English ▲

knock it off
to stop doing something that annoys you.
The boys were making too much noise, so I told them to knock it off.

Usage notes: usually used as an order:
Knock it off! I'm tired of your teasing.

[TahlilGaran] English Idioms Dictionary ▲

Knock it off!
[informal]
something that you say in order to tell someone to stop doing something that is annoying you.
Knock it off, will you? I can't work with all that noise.

[TahlilGaran] English Idioms Dictionary ▲

Knock it off!
stop doing something, quit
"Please knock it off! You are going to hurt yourself if you are not careful."

[TahlilGaran] English Idioms Dictionary ▲

knock it off
v. phr., slang, informal
1. To stop talking about something considered not appropriate or nonsensical by the listener.
■ Used frequently as an imperative.
Come on, Joe, knock it off, you're not making any sense at all!
2. To cease doing something; to quit.
■ Heavily favored in the imperative.
Come on boys, knock it off, you're breaking the furniture in my room!

[TahlilGaran] English Idioms Dictionary ▲