w noun a toilet. An abbreviation of the common WC NEW ZEALAND, 1916 W noun 1 a police warrant for search or arrest UK, 1956. 2 in sports, a win US, 1970 wac; wack noun 1 phencyclidine, the recreational drug known as PCP or angel dust US, 1981. 2 marijuana mixed with phencyclidine, the recreational drug known as PCP or angel dust UK, 1998 wack adjective inferior, unacceptable, very bad US, 1984 wacked adjective 1 excited US, 1959. 2 beyond repair. Extends WACK (inferior) UK, 1997 wacked out adjective crazy, eccentric, mad US, 1968 wacked up adjective crazy, odd, irrational...