An epic, and even violent doody event (anal explosion), after the consumption of McDonald's, or "Mickey Ds". It usually happens 1/2 hour to an hour after indulging in the omni-present Scottish cuisine. It gives no warning, and may render an unsuspecting individual with a STANK- ASS, and messy drawers! Big Macs are notorious for such an event.
Yo son, I just took the most stank-ass McDump after eating two quarter pounders, fries, a shake, and an apple pie. It was nasty yo, and cleared out the public restroom!"
master gas blaster tərəfindən 03 Yanvar 2003
3 more definitions
The unpleasant bowel movement that occurs within an hour of eating at a certain fast food restaurant. Most food takes roughly 4 hours to digest, but this biological puzzler takes less than an hour.
Just like clockwork, I had to take a McDump 15 minutes after I left the restaurant.
Mr Sleep tərəfindən 24 İyun 2007
Taking a shit in McDonalds and then just leaving it.
Dude, we've really got to go, I just took a fucking huge McDump and now the toilets backed up, there's crap everywhere and people are crying
ManWhore89 tərəfindən 09 Aprel 2015