[key-oh, key-oh; verb key-oh]Slang.
noun, plural kay·os, verb, kay·oed, kay·o·ing.
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.
noun, plural KO's.
a knockout in boxing.
verb (used with object), KO'd, KO'ing.
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. 2019
Related Words for kayosannul, exterminate, omit, abolish, erase, extinguish, delete, eradicate, blow, kayo, KO, TKO, efface, trim, cut, scrub, annihilate, drop, remove, discard
noun plural kayos
verb kayoes, kayos, kayoing or kayoed
Word Origin for kayo
C20: from the initial letters of knock out
verb KO's, KO'ing, KO'd, k.o.'s, k.o.'ing or k.o.'d
noun plural KO's or k.o.'s
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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