First used on a Sports Center commercial- Paul Pierce 34, Ray Allen 20, Kevin Garnett 5, they play for the Boston Celtics aka the greatest team ever assembled... also BostonThreeParty is a player on PSN that habitualy rapes kids until they stop playing
by Queenies 4 lyfe nikka February 26, 2008
When three guys screw the same girl by having her straddle the first while he is sitting in a chair, the other gets her from the back, and the third stands on the sides of the chair so she can suck his dick.
My friends and I couldn't figure out how we could all screw this hot girl so we decided to run the boston three party on her!
by Tyler, Matt, and Jeremy February 13, 2008