A small creature that crawls into your anal cavity and proceeds to create muffins at his leisure. Mind you, these are no ordinary muffins. Once created, there is only one way for the muffins to exit your rear.
by Jon November 28, 2003
guy 1: do you think shes hot?
guy 2: uhh, she gotta donk i guess.
guy 3: yeah she's a total assmuffin.
guy 2: uhh, she gotta donk i guess.
guy 3: yeah she's a total assmuffin.
by smellymellyhasabelly December 16, 2010
by Jon Himself March 26, 2003