verb (used without object) Slang.
Origin of conk2
British Dictionary definitions for conk off
Word Origin for conk
Word Origin and History for conk off
as in conk out, 1918, coined by World War I airmen, perhaps in imitation of the sound of a stalling motor, reinforced by conk (v.) "hit on the head," originally "punch in the nose" (1821), from conk (n.), slang for "nose" (1812), perhaps from fancied resemblance to a conch (pronounced "conk") shell.