K's win phrase

This may be a bit silly but my brother and I really want to know what K’ says when he wins a fight. It sounds like ‘Doitsu koitsu’. sounds like it but i don’t think this is how you spell it. Apart from ‘koitsu’. It makes sense if you translate it in google (guy, someone) so it’s like taunt or something. Does anybody know what it can be?
Thanks

i think it is “Doitsumo koitsumo” which literally means something like “Every one of you” but is used to say something like “every one of you is no good/ good for nothing”