Top Definition
The mix between a Badunkadunk and an Onion. Both of which symbolize a girl with a nice thick ass that would make a grown man cry (onion). The beauty of the word Ba-donion is that you can say it and not sound all stupid and trendy like the d-bags that can't come up with their own original sh!t.
Oh word, look at that Ba-donion!!

Yo pimpin, I would wear out that Ba-donion!!
by JRatt March 03, 2005
The mix between Badunkadunk and Onion. Both of which symbolize a girl with a nice thick, round ass.
Word son, peep the luscious ba-donion on shorty over there.

That ba-donion is clappin!!
by JRatt July 06, 2005

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