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1. badonkadonkey
A donkey, (equus asinus) with an abnormally large posterior (gluteus maximus).

Or, an ass with a big ass.
"Man, that mule has a big butt"

"Yeah, it's a real badonkadonkey"
by Cracker2000 Aug 23, 2004 add a video
2. badonkadonkey
A woman who possesses a beautiful round posterior, but unfortunately is otherwise quite unattractive.
" Dude, this girl ahead of me in line had a Fine Ass J-Lo booty but when she turned around I saw she was a total BadonkaDonkey"
3. Badonkadonkey
A girl that when at first glance, and viewed from afar, appears to have a sweet ass and tig ol' bitties, but upon closer inspection turns out to have a jacked-up donkey face.
Yo, that girl is a badonkadonkey but she's got a phat ass booty!
4. badonkadonkey
A person who is a jerk, with a large buttox.
"That person is an asshole, and has a large ass.
What a badonkadonkey".
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