The act of stuffing her partners scrotum into her vagina while he is fucking her ass.
Hey honey, interested in a banana nut muffin tonight?
Only if you shaved your balls. Last time the stubble killed my snizz
A muffin that loves bananas and nuts!
JEFF: Sarah, I'm gonna stuff your banana nut muffin!
A type of pastry that immature people find humorous because:
A: "banana" is slang for penis
B: "nut" is slang for testicle
C: "muffin" is slang for vagina
Normal Person: "Hey, would you like a piece of my banana nut muffin?"
Absolute Douche: *laughing hysterically
a blend of genders, so to say chicks with dicks...banana nut(hinting at...well that's obvious) + muffin(hinting towards having a "muff" aka vagina)
I woke up after a night of heavy drinking and asked the mistake next to me for some breakfast and she showed me her banana nut muffin.