knock it off

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!
Categories: informal slang verb

'knock it off' on video