Three Party 

A friendlier term used instead of saying "Threesome"

Can be used when you are in a social situation and you are not allowed to be inappropriate. Funniest when used by younger siblings.

Girl 1:"Hey im thinking about inviting Daniel and Melissa over tonight."

Girl 2:"What a great idea, you guys can have a Three Party!"

Three Party by g.Nat September 21, 2010

Boston Three Party 

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

Boston Three Party will wreck any another team in the NBA by themselves

Boston Three Party by Queenies 4 lyfe nikka February 26, 2008

boston three party 

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!

boston three party by Tyler, Matt, and Jeremy February 14, 2008

three panty system

When three lesbians have a love triangle. One should be masculine.

Why Diedra and Susan, would you like to have a lesson in the three panty system in my bedroom? - Jill

three panty system by Agnes2010Scottiez April 1, 2010

Three Part Pussy Shot 

Any alcoholic shot or drink that has more than two ingredients. A great way to slow an already busy bar to a dead stop. Ordered and consumed more often than not by women.

The place was busy, two bartenders running their asses off. Fred thought he was getting close to being served, but then the group next to him had the bartender rounding up the RumChata, Vodka, fruit juice, pixie dust., etc. "Shit. She has to make four Three Part Pussy Shots, I'll be here forever."

Three Part Pussy Shot by OldFart77 September 4, 2016

The three-part text message cancellation

The passive-agressive, real-time technique a girl will use to cancel a date with a guy, starting with an initial postponing ("seeing a friend from out of town!"), a second postponing ("my friend is late, sorry!") and ending with outright cancellation, often without a second date suggestion ("Sorry, can't make it tonight! Talk soon")

The three-part text message cancellation goes as follows:
Girl: Hey, yeah, my friend Anna is in town for the night, and we'll just get dinner. Meet afterward for drinks?
Guy: Sure.
Girl: Yeah, so she's kind of down, I'm gonna have a couple of drinks with her, is that okay?
Guy: Yeah, I'll see you later.
Girl: Okay so Anna is sleeping over, girl's night in. Really sorry.
Guy: Okay, so we do this later then?
Girl: ...

The three-part text message cancellation by TheMontrealGuy October 21, 2011

Christmas Tree Party 

When you stick your penis in the thing you pour water into and your friends are watching and joining in slowly and slowly

Christmas Tree Party is the perfect gift if you want to be pleasured

Christmas Tree Party by Hms Faggots December 21, 2017