to stop doing something, esp work
to do or produce (something) hurriedly or routinely
She knocked off one painting after another
to stop (esp work)
to deduct (an amount)
He offered to knock £50 off
informal to kill (somebody), esp intentionally
informal
to steal (something)
to rob (e.g. a shop or bank)
Brit, coarse slang to have sexual intercourse with (somebody)
knock it off
often used as a command: to stop doing something