The act of and or the being of an annoying person, And/or the act of pursuing a dead joke, or continuing a joke that is commonly known as being not funny.
EX: My friend(we'll call him Drew)Drew, is being a Ever so Fricken Turd muffin.
by Maxisking July 25, 2005
A turd muffin is the act of being, stupid, commonly reffered to as dumb, retarded.
Dude, stop being a turd muffin.
by Alec "Baldwin" November 28, 2004