Muff

A comical saying, commonly used as an ending to an insult, includes the forms of muffing, muffed, muffs or muff-dick. It can be used as an expression of disappointment or disgust usually after a ugly bricked shot in a game of 4 on 4 Lifetime basketball or in the situation of guy getting rejected by the hot girl next door, who is also a slut. In noun form, calling somebody a Muff is basically like saying, wow you're an extremely lame asshole with no game of any sort. This phrase is used by teenagers throughout Minnesota and can surprisingly indicate joy or laughter when said in a easy-going predicament.

EXAMPLE #1
Joe to Dave - "Hey nice shot asshole! *Fart noise* MUFFFFFFFFFFFF!"

Dave to Joe - "Oh fuck you dude."

EXAMPLE #2
Jake - "Bro did you end up getting your ding dong rubbed by that slew next door?"
Armin - "Nah man, I thought I had her on lockdown but her dad was home."
Jake- "Hahahahaha muffffffffffffffffffffffffff"

EXAMPLE #3
Reggie - "Did you hear about the new shake-weight? It looks like somebody's masturbating when they use it."
Damian - "Oh no way hahaha, that's only something a muff would use."
Reggie - "Shit, these damn muffs are taking over the world nowadays!"