The material of a man's penis. Usually a rough and rigid type feeling like the bark of a tree. Common with old men. When one man is turned on, instead of cum; the penis will let out sap- but the sap will have a difficult time coming out.
My husband and i had sex for the first time, and he had a Tree Trunk.
by JamieMicks December 07, 2010

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Top Definition
A fatass thigh.(Commonly Associated with Cankles)
Damn! Look at those girls legs. Them some tree-trunks!
by Mr.Finger December 01, 2003

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A big fat cock of exceptional girth and length.
Yeah man, she was so hot. When we finally made it to the crib, she said, "Whip out that big 10 inch asian tree trunk of yours!". I was like, "DAYAM WOMAN! You betta call Tyrone! I'm out, bitch. PEACE"
by tbone343 September 05, 2005

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A pretty good way of describing someone who has really thick legs. Often accompanied by a beefneck.
Help! My treetrunks are stuck in this gravy pouring from my beefneck!
by megapixel October 06, 2003

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Also known as a kankle. When your leg and foot meld into one.
Look at those tree-trunks
by Thomas Caffrey June 21, 2004

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fat ass blunt
Damn can i even fit that tree trunk in my mouth?
by Mattitude and mikeaholic May 03, 2003

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A man with arms the size of tree trunks!
"Dude, that trainers arms are the size of tree trunks!"
by AGenius May 29, 2009

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tree trunks are a name for a person with, lager legs. And usually beer belly.
did you see beth, she has well bad tree trunks.
by anaonaon November 09, 2011

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