[key-oh, key-oh; verb key-oh]Slang.
Origin of kayo
An Americanism dating back to 1920–25
or K.O., k.o., kay·o
[noun key-oh, key-oh; verb key-oh]Slang.
- a knockout in boxing.
- to knock unconscious, especially in a boxing match; knock out.
Origin of KO
First recorded in 1920–25; initial letters of knock out
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for kayo
“Kayo Tortoni” is acknowledged the most famous woman character in sports cartoons.What's in the New York Evening Journal
New York Evening Journal
- boxing another term for knockout
- boxing another term for knock outSee knockout (verb)
C20: from the initial letters of knock out
- a slang term for knock outSee knockout
- a slang term for knockout
Word Origin and History for kayo
spelled-out form of K.O. (knockout), from 1923. Also used in 1920s as a slang reversal of OK.
Online Etymology Dictionary, © 2010 Douglas Harper