The amount of times a man or woman creates conversation with the other sex and either makes friends or scores. Referred to as an achronym, the ftf ratio tracks the consistency and strength of any person's pick up skills.
Ellsworth's friend to fuck ratio couldn't be lower if he was asexual. He has been instantly thrust into any woman's friend zone.
by Boonville All Star May 12, 2009
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A friend you have casual sex with only for the purpose of having sex. Romantic feelings for one another are not present.
Mindy and Bob have sex together but only as friends.
by D February 21, 2004
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n. When two people have a friendship involving casual intimate encounters usually of a sexual nature. Typically, the pair have regular romps without any heavy strings attached. The two people scrump and hump without obligation to be more than casual intimate friends.
My fuck friend is uncanny. He is the bomb and I love it when he explodes in my pussy.
by Barry Flomar January 18, 2004
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1. a bud who will fuck you
2. no friend at all
1. last night, I was horny, so I went to see amy, my fucking friend.
2. last night, I was horny, so I went to see amy but she was with bob who I thought was my fucking friend.
by germinate March 23, 2005
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1. a friend who you have sex with
2. a friend whom you like less than your other friends
1. who's that your girl/boyfriend

no that's my fuck friend.

2. tom was busy tonight so i brought this fuck friend of mine.
by TONEKNOWLEDGE44 January 19, 2009
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A friend who fucks you over
He fucking told on you?? What a fuck friend!
by imposturized November 26, 2014
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