Copper muff 

A red-headed person, so called on the assumption that a person who has red hair above must also have red hair below. See also muff.

Envious damsels cruelly love: / They called Gemima 'Copper Muff' / And 'Orange Juice' and 'Gingerbread'. / She never heeded what they said, /But, silent, combed her glist'ring curls /And shunned the spiteful jealous girls.

Alfred, Lord Tennyson - from 'Ginger Gemima' (1854)

Copper muff by Lancelot Gobbo July 22, 2013

muffin chopper 

1) The muffin chopper is an anus or ass; the part of the human anatomy used to "cut a muffin". The "muffin" is a light fluffy fart or poot.
2) A female's ass which is particularly attractive.

Brak: OMG, look at that muffin chopper in the crosswalk!

Zorak: Mmm, I'd like to wear that for a hat!

muffin chopper by 3vilPrimate March 13, 2009