To perform improv.
Improvisation.
A form of live entertainment characterized by improvisation and interaction with the audience.
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.