You... you wouldn't understand, it's a Jersey thing.
...actually, it refers to the gunk that comes out of a vagina (a muff) , i.e yeast infection or other disgusting things of that nature. It's pronounced Gah-bage so often mistaken for Muff Cabbage.
You're muff gah-bage! Get outta here!
What did that guy just say? Muff Cabbage?
No, no, it was Muff Garbage, you wouldn't understand, it's a Jersey thing...