kayo /ˌkeɪˈəʊ 
/ Boxing informal ▸ noun (plural kayos)
a knockout: a sixth-round kayo.
▸ verb ( kayoes, kayoing, kayoed)
[with object] knock (someone) out: he was kayoed by Patterson in the sixth round
it's a software virus that kayoes computer systems.
– ORIGIN 1920s: representing the pronunciation of KO.
EnglishOxford Dictionary of English
