knock off
(slang) To halt one's work or other activity.
(slang) To kill.
(by extension) To defeat.
To remove, as a discount or estimate.
(slang) To rob.
To make a copy of, as of a design.
To assign (an item) to a bidder at an auction, indicated by knocking on the counter.
(British) To have sex with (a woman).
(informal) To accomplish hastily.
To remove (something or someone) by hitting.
(knockoff)