A get-together held by really cool people with names like Sam and Sarah and Lunden and Frannie that is like a family reunion for people who aren't related. Lots of fun.
Sarah: Hey, Lundens going to be in town for the weekend. We should have a best friends party.
Sam: Great idea! Be sure to invite Frannie too. As many people should come as possible!
by baseball7 April 11, 2010
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A party where girls and guys have sex and the guy gives the girl a bracelt saying to keep it a secert and that they are now "best friends forever"
Tom: are you going to the best friends forever party this weekend.
Kate: Yea, i cant wait to find new best friends forever
by ae_chick May 14, 2009
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