KTFO 

Stands for: Knocked the fuck out.

A mesh of the two acronyms "WTF" and "KO" minus the W.

Most famously coined by Chris Tucker in the film "Friday" featuring himself as well as Ice Cube the rapper.

Aw snaps homie! You got KTFO by that mofo!

KTFO by homeslicefromtehhoodz April 3, 2008

KTFO 

Know the fuck out

“Today was pretty fun”
“Yeah bro but I’m about to KTFO”
“Same”

KTFO by The urban bandit June 1, 2018

ktfo 

Keep The Fuck Off
Used to emphasize ownership.

This notepad belongs to Walter, KTFO!

ktfo by Pete May 1, 2004

KTFOBAMN 

Stands for Knocked The Fuck Out By Any Means Neccessary.

That kid over there, he is about to be KTFOBAMN.

KTFOBAMN by Badass bra from the hood November 15, 2007