1.) Alternate form of kthxbye which means "Ok, Thanks. Owned." This is used to declare superiority over someone, but usually only succeeds in making the user look like a complete and total idiot.
uber1337: Hahahah you suck. kthxownt
Manawski: Is that what you say every time you drop a nuke on a sniper?
Manawski: Is that what you say every time you drop a nuke on a sniper?
by Manawski March 7, 2003