Someone in possession of a large posterior. Also known as "junk in the trunk."
Hey, did you see Becky's huge badunkadunk butt? It looks like she has balloons stuck to her ass!
by MRI July 31, 2005
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any chick with a HUGE butt, sticks out, bubble butt, round and plump butt
Stephanie has a badunkadunk butt for a white girl.
by Jessie B. August 15, 2005
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a butt where the two halves move intwo directions at the same time, the left will go up while the right goes down. when they cross they form a badunkadunk
Matt was walking behind the girl to see if she had a badunkadunk butt. then he prematurly ejaculated all over his whitey tighties.
by Kben October 20, 2005
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a tree with a thic ass and bark
Damn look at that badunkadunk trunk on the Quercus robur!!!
by bruhdisease February 11, 2021
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A swollen, round, bulb shaped badunkadunk.
Shit son, look at the bulbous badunkadunk.
by AH August 27, 2003
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A person with a large butt, or some one who has "junk in the trunk" usually refers to black or hisppanic girls.
Girl you got a badunkadunk butt
by MOA Aduba July 7, 2005
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Sexual intercourse between the thighs, but immediately below the female posterior. This will usually result in the top surface of the penis stroking the vulva, labia, exterior opening of the vagina and, ideally, the clitoris.

There is no penetration involved, thus making the technique ideal for women who experience pain during normal intercourse; it also reduces the probability of pregnancy occurring. Please note that the probability of STD transmission is not reduced significantly, so condom use is a must for casual instances of this type of sex.

Minus the dictionary mouth:
You probably won't get pregnant, but don't count on it.
You can still easily get herpes, syphilis, gonorrhea, HPV, and AIDS... among many other STD's.

Oh yeah, to make it TRUE sub-badunkadunk sex, you gotta take her from behind (or him from behind if you are man-loving man.)
Yasmin has a yeast infection, so I've been bangin' her using the ol' sub-badunkadunk sex routine.
by Briancer November 19, 2009
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