where 3 ppl, usually either 2 males and a female or 2 females and a male have sex together, lots of diff postions and is quality to do !!
by know it all February 17, 2005
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Bob: Yeah, I had a 3sum last night!
Tom: Was it good?
Bob: The third person, Was such a good recorder, It could have been a porno!
Tom: When you make it A movie, I'm buying it.
Tom: Was it good?
Bob: The third person, Was such a good recorder, It could have been a porno!
Tom: When you make it A movie, I'm buying it.
by BlahhhhhhBiiiittchh! January 14, 2010
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Get the 3sum mug.by John OD November 2, 2003
Get the 3 sum mug.When you find a girl and start having a 3 sum with her then you randomly stop nad start sucking each others dick
by Penis in butt January 27, 2021
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