- to break or fail, as a machine or engine (often followed by out): The engine conked out halfway there.
- to slow down or stop; lose energy (often followed by out).
- to go to sleep (usually followed by off or out).
- to lose consciousness; faint (usually followed by out).
- to die (usually followed by out).
Origin of conk2
- (of machines, cars, etc) to fail suddenly
- to tire suddenly or collapse, as from exhaustion
- to strike (someone) a blow, esp on the head or nose
- a punch or blow, esp on the head or nose
- the head or (esp Brit and NZ) the nose
Word Origin and History for conk out
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.
Idioms and Phrases with conk out
Stop functioning, fail, as in The engine finally conked out. [Colloquial; early 1900s]
Fall asleep, as in Every evening he conked out in front of the television set. [1940s]
Faint or collapse, as in I don't know if it was the heat, but she suddenly conked out. [1920s]
Die, as in He's paranoid about conking out and he's only twenty! [Late 1920s]