Someone who routinely hangs out in vaginas. Orginated from the film Stepbrothers:

Alice: "Oh, Dale. You are something. You are something."

Dale: "You're something too."

Alice: "I wanna roll you up into a little ball and shove you up my vagina. You could just live there. It's warm and it's cozy."

Dale: "In your vagina?"

Alice: "I wanna walk around with you in there and just know that whenever I feel a little tickle or scratch that it's just your hair up my vagina. Please, just do it for me."

Dale: "What's happening?"

Dear Dale - you are becoming a muff ball.

When you eat dirt for the first time and leave your family to build a shack in the woods

the game of trying to throw a football into a big prickly bush commonly referred to as "the muff" the defenders must dive in to save the ball from touching the bush or landing in it on a fly. created by 3 middle-lower class white kids in northern illinois