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A male or female who enjoys the act of stealing muffins. These people are often over weight and hated.
Hill Billy: "Hey Randy!"

Randy: "Yeah!"

Hill Billy: "Some MuffinMugger Stole my muffin!"

Randy: "You never had a muffin!"

Hill Billy: "Whats a muffin?!!"
by Alex and rory January 20, 2008
The #1 Reptile
Joe: I was playing online Mortal Kombat today and i lost 150-0 against a Reptile.
Brant: Must have been MuffinMuggers. Everyone knows he's #1.
by Pig Of The Hut December 06, 2012