The act of dropping a massive shit in the toilet causing the temporary suction of all oxygen from your bathroom, followed by an immense reverse flow of toilet water to shoot out of every faucet in the house and piss your mom off.
MOM-"Tim what the fuck is going on is that an earthquake that just happened? All the faucets in the house are shooting water and making noise"

Tim- " Nah mom, chill the fuck out, I was just dropping a mega deuce in the bathroom. Now call a plumber bitch"
by Jokerofdeception September 14, 2008
1 more definition
Top Definition
1. A class of giant fighting robots in the Anime series Big O. Several robots can be seen throughout the series, the most popular ones being Big O, and it's archenemy, Big Duo.

2. A massive, steaming pile of shit.
1:
Oh my God! It's Megadeuce! He's coming to save the day!

2:
Man, I wouldn't go in there, I just dropped a MEGADEUCE, and it's peeling the paint off the walls as we speak.
by Krunk! December 09, 2003

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