Top Definition
Person who calls almost everyone they know there bestfriend causing fighting to erupt between the people called bestfriend and forcing the bestfriend slut to make hard decisions
Tony: Keith yo mah bestfriend dude
Johnny: I thought i was your bestfriend
Tony: you are i was just saying that to Keith to make him happy
Johnny: your a bestfriend slut
by J. Peeyongson April 21, 2008
A person who keeps changing their best friend and ditch the old ones.
Sagana is a bestfriend slut.
by xoxox~ March 02, 2011
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