look up any word, like cunt:
 
1.
Best Friends that Fuck
"Clarissa is my best friend, and we fuck but we aren't together we are just BFTF"
by Thatguyyoudontknow January 04, 2013
 
2.
Best Friend to Fuck. you text this person. you fuck this person. you may be dating them in your mind, but they don't know it.
"Where were you last night?"
"Just getting laid at my bftf's house"
"Does he know?"
by nikolynna January 28, 2012
 
3.
Be free to fuck
Like beeing single ?
be free to fuck ?
are you bftf ?
Yes i'm free to fuck
by cool910 February 16, 2011