Best friend-in-law 

The odd occurence that when you are going out with someone you inherit their best friend as one of your own good friends. Often occurs more that a girl will become very close to her boyfriends best mate than the other way round.

"You and Johnny are such good friends How do you even know him?"
"Oh Hes Toms best mate so hes my Best friend-in-law"

Best friend-in-law by WooBlackbetty December 9, 2008

Ghost Friend 

When you unfriend someone on Facebook without telling them, and without them figuring out that it's you that unfriended them.

"Dude, I totally unfriended Paul, and he has so many Fakebook friends, he didn't even notice"

Ha Ha "you're such a ghost friend"

Ghost Friend by thegranitehills February 3, 2010

Best Friend 

1.term formerly used to describe the BEST friend of a person,now used by teenage girls to describe MOST of their friends
2.better friend in a group of friends

Kelsey:"hey jen,am i your "best friend"?"
Jen:"yes,of corse"
Ashley:"hey Jen!"
Jen: "oh hey "best friend""
Kelsey: "WTF?"

Best Friend by Magicoa April 8, 2010

fat friend 

The obese/chubby friend of a hot male or female that can always miraculously keep them out of a relationship with you. The best thing to do with them is to friend them, then start a relationship up with your target. Afterward, do something that will cause the fat friend to split up with your lover, so that there will be no more of her/him.

Dave: My god man, that woman is soo hot. The things I'd do to her...
Jason: Good luck, man. Her fat friend always pulls her outta here before you can do anything.

fat friend by AdolescentWit June 21, 2009

Friend Date 

An outing with a friend (or friend of a friend) of the opposite sex that is not romantic.

Don't be jealous. It was just a Friend Date.

Friend Date by WickedThorn October 18, 2012

fuck friend 

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.

fuck friend by TONEKNOWLEDGE44 January 19, 2009

friend++

A friend with whom you're having a loveless sexual relationship.

I just upgraded Sheila to Friend++.

friend++ by corsair2 September 4, 2003