the act of taking a massive shit that leaves behind an aftermath worse than the nukes that were dropped on Nagasaki and Hiroshima
"hey can you watch my grandfather for me? I've got to take a mondo duke
by dat boi 666 May 16, 2016
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1. (n) The gigantic shits that you take after a large meal, eg) post-thanksgiving dinner.
Aw jeez, Martin, I just dropped a mondo duke in your toilet and I broke sea level! Anyways where’s your plunger?
by Cranjus McBasketball IV November 16, 2020
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When your shit is bigger and more explosive than you thought causing you to flood and overflow the bathroom than you are in making it look like it’s from so sort of horror movie.
“Dude I took a Mondo Duke!”
“Crap, lets get out of here!”
by Nibbachin July 11, 2018
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The act of taking shits worse than the bombs dropped on Japan the art of the Mondo Duke leaves the bathroom render useless as any nigga who dares to enter will gang banged by the intense smell of your masterpiece thus named a Mondo Duke
Bill:Man I took a MONDO DUKE
Jose: que? MONDO DUKE?
Bill:Jose i took the biggest shit ever the bathroom cant be used anymore
Jose:Que? Bano?
by Niggalini May 18, 2020
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