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An offencive fart that sounds as the word is pronounced.
To Gwup, I have Gwupped, What a wonderfull Gwup
by Herr Gwup March 29, 2005
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(n.) - The act of farting while urinating.

(v.) - To fart while urinating

Etymology: An onomatopoetic acronym, which stands for: Gas while u piss. It draws its origins from a long discussion outside of a local burger joint in Texas.
Due to the amount of gas that's built up while I sleep, I'll usually gwup when I visit the commode after waking up.
by datgwuptho August 21, 2017
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