To accomplish hastily.
To rob.
To defeat.
To halt one's work or other activity.
To have sex with.
To remove, as a discount or estimate.
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.
To remove by hitting (something, someone)
To kill.
To do by guessing, intuition, or trial and error; to react to events as they occur; improvise
To play guided by one's musical ear, rather than from a written score.