look up any word, like blumpkin:
 
2.
Acronym for "kick the f*ing ball." Literally, something you would yell during a game of soccer to someone who is staring at an open goal with no defender in sight.

However, in a more general sense, it means that someone is staring at a golden opportunity that can be easily achieved and all they need to do is to KTFB and get an easy win.
In soccer:
Announcer: Messi passes the ball to Milito inside the penalty box and Robert Green is off to get some fish n chips! KTFB!!

In life, generally:
Mr. A: That girl is totally hitting on me!
Mr. B: KTFB!!
by Siddy Boy July 21, 2010
 
1.
Keep the fires burning. As in not forgetting an experience and keeping it close to heart. The phrase usually is referring to Camp Nebagamon.
Person A: "This was a great summer!!"

Person B: "I know! Remember to KTFB!!"
by Hammerguy4 September 25, 2011
 
3.
Knee Trembler From Behind
KTFB Figure it out for yourself dimwit
by Griptool September 14, 2007
 
4.
kick the fuck back - when someone says something its its unbelievable
BoB: Dude, I totally banged that girl from last night.

Booby: KTFB
by Lor4 October 06, 2006