kayo

[key-oh, key-oh; verb key-oh]Slang.
See more synonyms for kayo on Thesaurus.com

Origin of kayo

An Americanism dating back to 1920–25

KO

or K.O., k.o., kay·o

[noun key-oh, key-oh; verb key-oh]Slang.
noun, plural KO's.
  1. a knockout in boxing.
verb (used with object), KO'd, KO'ing.
  1. 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


British Dictionary definitions for kayos

kayo

KO

slang
noun plural kayos
  1. boxing another term for knockout
verb kayoes, kayos, kayoing or kayoed
  1. boxing another term for knock outSee knockout (verb)

Word Origin for kayo

C20: from the initial letters of knock out

KO

k.o.

verb KO's, KO'ing, KO'd, k.o.'s, k.o.'ing or k.o.'d
  1. a slang term for knock outSee knockout
noun plural KO's or k.o.'s
  1. a slang term for knockout
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

Word Origin and History for kayos

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