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When you dress up like a historical figure and fuck someone in the ass.
Did you see my George Washington costume? I’m going to onderdonk the shit out of her tonight.
by migglez June 07, 2018
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2
The rapping of a girl after intentionally getting her drunk.
Yo give her another beer so we can pull an onderdonk on her later.
by Odeezie December 04, 2009
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3
Someone who overtly uses proper grammar, really long sentences, and pompishness in day to day life.

Some guilty of onder
Gabriel always uses such pretentious vocab and grammar. What an onderDONK.
by chniwt May 28, 2018
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