Person who is an idiot and has no clue what is going on in the world around them. This person can also be a superfatass who wears a burger king crown on his head (Ex. King Bungmuffin)
King Bungmuffin liked the look of Johnny Odaseed's sexy ass so he offered him some dead chicken.
The term "buttmuffin" is an affectionate term, a term of endearment, used to describe a person with a nice ass (usually a female) – the "butt" referring to ass, of course, and the "muffin" being a reference to a soft, sweet, sponge cake.
The term "buttmuffin" may also be used to describe a person with a particular fondness for nice, or "sweet", asses; however, the term is not descriptive of faeces, in any way.
Suki said, "hey, buttmuffin", to Mikayla, as she walked into the room, and gave her sweet ass a lil squeeze.