(originally African-American Vernacular, slang) Annoyingly or disappointingly bad, in various senses; lousy, cringy, uncool, messed up.

An eccentric; an oddball; a weirdo. / (dated, disco-era drug slang) PCP, phencyclidine (as also whack).

(UK, Liverpudlian) A friendly term of address.

(geology) A soft, earthy, dark-coloured rock or clay derived from the alteration of basalt.

plural of wack

plural of wacke

plural of wackness

(slang) Badness; contemptibility

A surname.

plural of Wack