muffin hopping 

when a morbedly obesed woman or man wears too tight of clothes and her or his lower back fat buldges out of there pants.

damn that girl is big as hell, Her back be muffin hopping.

muffin hopping by michele derek February 23, 2008

Muffinhopping 

The process of pulling down your pants on the side of a road and hopping across on your ass

Yo dawg, wanna go muffinhopping today and fuck up traffic?

Muffinhopping by the muffinhopper March 26, 2011