look up any word, like sparkle pony:
 
15.
Where there are 3 people sexualy active at the same time

with either
m&m&m
W&w&w
W&W&M
M&M&W

with 3 people involved
1.My Husband and I invited a friend over for a threesome
2. I love when my wife invites her blonde friend over for tea cause it ends up being a threesome
by weemooooo May 05, 2009
 
16.
A wholesome mix of homosexuality and heterosexuality. Or you can just say, from the movie Get Him to the Greek, "It's just like having sex with your girlfriend while someone else also has sex with your girlfriend."
Let's have a threesome!

But I'm straight...

So am I.
by knexer November 13, 2010
 
17.
when three people are getting some from each other. not necessarily in the popular male+female+female configuration
-hey Julie, wanna hook up later today?
-yeah, but I have a guest at my house. my cousin is visiting
-threesome then?
-um... sure, let me just call him and give him a heads up
-him? um.. actually, let me get back to you on this one, I think I'm coming down with cancer
by ana von hindenburg March 02, 2012
 
18.
The gathering of an Asian, a Mormon, and a white person, often to watch disney movies or play kh.
At our threesome last night, we watched The Lion King and defeated the heartless.
by Inerti January 30, 2009
 
19.
When two guys and a girl (typically), or two girls and a guy have sex all three of them together.
Marc and his girlfriend Nina were playing chess at Marc's place. Nina was staring at his deep blue eyes and was getting kinda horny. She leaned over and started kissing him passionately. Marc groped her boobs and started taking off her shirt after a few minutes of that. She ripped his shirt off and undid his pants. She kissed his neck, stomach, and then got down to his dick and gave him a glorious blowjob. He returned the favor by fingering her and then eating her out. All they wanted left was his cock in her cunt. He banged her until they both orgasmed, at which point his always horny roommate heard them and came over. He got into her asshole and banged her from that side. Nina was overwhealmed and had the greatest orgasm she'd ever experienced. After about half an hour of that they switched so Jonas got her pussy. They got bored of that and ate her out again. After a while Nina felt the need to repay them, so she blowed Jonas while giving Marc a hand job. Then she turned all her attention to Marc have him a blow job while Jonas ate her our her good. Marc needed something to do so he decided to fuck Jonas anally. Then they switched so Jonas fucked Nina, Nina blew Marc and Marc groped Nina. They continued switching positions of this threesome until the sun rose.
by cuddlebear May 28, 2014
 
21.
when a man loves a woman he asks another man or another woman to join them in bed. works in various permutations, genders, and positions. be creative.
Man: honey, i love you. let's invite our next door neighbor to the bed with us to show how much i love you. threesome, biatch.

Woman: YOLO.
by swegqurl November 10, 2013