- KO
- AND kayo [“ke”o]1. n. a knockout. (The abbreviation is an initialism. Boxing.)□ It was a quick KO, and Wilbur was the new champ.□ It was a classic kayo. It was quick and effective.2. tv. to knock someone out. (See also KOed. Boxing.)□ Wilbur planned to KO Wallace in the hird round.□ Wilbur usually kayos his opponent.
Dictionary of American slang and colloquial expressions. 2015.