Can mean anything you want it to. It can be used to replace words that you would get in trouble for.
Stop touching your treenie and get your treenie outside you fucking treenberg. (cock, ass, dipshit)
by Mr. Shazbot May 18, 2004
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Huge penis that can be mistaken for a tree, the kind of thing you see in modern porn. A penis so big you wonder how any mortal woman can take it.
Holy shit! That thing is huge! If your girl can take a treenis like that, she's ruined forever.
by alfalfa31 July 28, 2009
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A tree that is shaped like a penis. Usually on a slight slope or hill with a curve at the base, giving the image of a treerection.

See also: cuntree
"Now, I'm just gonna stick this treenis into this cuntree and make a lean-to shelter!"
by Drewboy64 August 6, 2007
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Dave pulled out his member. Man that thing was like a tree. He had a treenis
by Gber December 27, 2017
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Ok this is one my friends made up. A treenis is a drawing of a penis with leaves at the top so fags and parents won't think that it's a penis, instead they think it's a tree!
Guy one: (drawing a penis on my friends shirt) LOOK A PENIS!

My friend: MY MOM'LL KILL ME IF SHE SEES THAT! i won't be able to wear that shirt!

Guy 1: No problem! (draws leaves at the top to make it look like a coconut tree) IT'S A TREENIS!

by Desiree A. December 15, 2005
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The name of a really cool gal named Trina.

Treenis, it ryhmes with penis.
14 inches of pure bliss.

He went with Treenis to the sports grill.

by goose13 August 21, 2006
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The penis found at the trunk of a redwood tree.
Billy: “Yo bro I saw a massive treenis on that redwood over there, you should totally ride that thing
by Handle Mycock February 1, 2022
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