1. (n) A sample of human excrement which is so large in physical volume that a sense of alarm is immediately raised as it is commonly mistaken to be the size of the now extinct animal, Elephas americanus; colloquially referred to as the "Mastodon"
2. (n) A shit so absolutely anus-tearingly huge that you'd fucking think it's a real life mastodon erupting from your rectum.
2. (n) A shit so absolutely anus-tearingly huge that you'd fucking think it's a real life mastodon erupting from your rectum.
Bob: Dude I just dropped a huge fucking mastodeuce in my ex-girlfriend's toilet and it won't fucking flush. LOL!
Jeff: Nice fucking work dude. You should blame it on her mom.
Jeff: Nice fucking work dude. You should blame it on her mom.
by EarlUxbridge August 22, 2014