look up any word, like sex:
 
1.
Thank you Facebook
Guy1: damn is there a party at Kevin's house tomorrow

Guy2: idk man facebook it

Guy1: Yes there is TYFB
by DaZapper12 December 28, 2010
 
2.
Tickling your funny bone.
Haley: You're ugly and fat.
Tracie: Meanie.
Haley: Oh, I'm just TYFB'n you!
by Mallory Masochist August 16, 2008