· Slang for assassination (mainly used by the Italian-american Mafia members) · Wank (as in "Wack off") · WACK, the former television program Wild & Crazy Kids · WACK, the current television program Wrestling Association of Championship Krushers · A slang term for the Backslash symbol · A negative slang term for 'bad' 'poor' 'weak' Likely derived from NCAA WAC Conference · A rapper stage name Wack Deuce Other forms include wacking, wacker, and wack attack. Disambiguation