A description of one or both individuals in a couple who were at first "just friends." Commonly referred to as "friends with benefits" these indivuals are literally "Buddy Fuckers"
Person1: "Are Kevin and Nichole dating? I thought Nichole was single."
Person2: "Kevin says they're just buddies, but everyone knows he's a Buddy Fucker."
muffin fucker (v): someone you offers to do something solid but ends up pussin out and being an overall bitch by not closing the deal
T-Co is a muffin fucker because he is going to DD us out to the lake but sleep there like a muffin fucking whore. he will also probably be a muffin fucker and eat all the muffins in the morning too.