The name of a burger unlike any other, famous in Portland Oregon.

It's a grilled cheese sandwhich for one bun, a 1/4lb angus beef patty, egg, bacon, ham, spam, the extras (lettuce tomato etc), and another grilled cheese sandwhich for the top bun.
You: Dude, that is the most redonkulous burger I've ever seen?!

Me: Yea, its the Redonkadonk.
by JackieStan June 4, 2010
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a ridiculously large ass, so much so that you must have it, there is no other way
I tried talking to a redonk yesterday yet she had a boyfriend, her butt was so crazy it was a redonkadonk
by thenza May 27, 2015
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