A medical term used to describe a female with a disproportionately large gluteus maximus region in relation to the rest of her body. Scientists have discovered that, in this condition, any food eaten by the afflicted turns immediately to fat then migrates rapidly to the gluteus maximus. Research has found that this ailment is widespread throughout many areas of North America and is oddly prevalent in African-American females. While there is no known cure, as long as there are males of the species and alcohol remains readily available, these females are still well-received in society.
White Guy: Hey Snoop...that Maltliqueisha has some serious Junk in the Trunk, huh?

Snoop: What tha hizzle did you say to me, cracka?

White Guy: Uh...it has to be 4:20 somewhere...

Snoop: I thank I forgot sumpin' in ma car (ya know what I'm sayin')...I'll return in a minizzle.

White Guy: Word!
by Illiterate December 14, 2005
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a girl that has a nice big round ass
all of you fat white chicks taking pictures of yourself dont have junk in the trunk, youve just got a big fat flabby white ass, a nice ass is round and on a girl with a tight body, so stop posting pics of urself and posting them definitions like these
by sycop August 16, 2005
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Slang, synonym of callipygian. Implies an oversized buttocks, disproportionate to the waist or the rest of the body. Usually complimentary.
"Look at Keisha's ass... Man, she has some junk in the trunk!"
by this-is-ridiculous August 22, 2008
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1. A really nice ass, usually affiliated with black women.
2. Sex
1. Damn that chicks got some junk in the trunk!

2. ... I put my junk in her trunk...
by MaximumOverdrive October 18, 2008
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:a project chick that has a shapely ass and a small waist. a round jiggly ass.
You can tell Keisha has junk in the trunk by the way she's throwing dat ass from side to side.
by vinchap February 15, 2005
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A large bottom, especially when the person attached otherwise attractive.
She is pretty cute, but she's got a lot of junk in the trunk after eating dorm food all year.
by VAKI5 May 8, 2005
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