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1.
A western fight engaged by the duel of one opponent, typically making music with one percussion.
You and I must faaf!
by MrActivisionary January 03, 2011
 
2.
a shortened, americanized bastardation of the samoan word "fa'afetai", meaning thank you.

pronounced: fahfs (-ah as in "father" not "apple")
person1: can you pass the salt
person2: (passes salt)
person1: faafs.
by Chuggs619 July 18, 2008
 
3.
Fucking Awesome As Fuck
I spoke to Mary, and she said my graph was totally FAAF
by RMTP May 27, 2008