When two people have sex up a tree. Yes, the tree is like and extra person there alot you and do with it ... use your imagination!
Derek: Let's have sex
Ronnie: Ok
Derek: Just you, me and the tree
Ronnie: Ohhhh, a treesome you thoughtful bastard
Treebranch: Ohhhhh baby ...
by PrezMeister December 6, 2007
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A threesome with one girl and two guys.
"Yo, what's a treesome?"
"It's just like a threesome, but with more wood"
by JGreenFruit July 26, 2013
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A threesome or threeway where two (or all three) of the members are in the same family tree.
Becky is such a slut, she had a treesome with the Dailey cousins.
by Alek K. August 28, 2008
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A threesome or threeway where two (or all three) members of the orgy are related (part of the same family tree).
Becca had a treesome with the Bailey cousins.
by Nutwrap September 6, 2008
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When Aaron Hillman is in the forest and gets aroused and you catch him with a branch of his ass and his dick in a knot hole.
Nae- BJ why does Aaron Hillman look like he's walking around with a stick up his ass
Bj-I don't know I guess he must have been having another treesome

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BJ from the Block
by Thesaurus.sore.ass December 7, 2022
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