Partridge Breast Pussy

Typically- this saying stems from a theory pertaining to women's lip shape (mouth) as to her vagina. So for instance, if the female has a smaller upper lip, as opposed to her bigger bottom lip- it's called a Partridge breast pussy. Meaning- it's similar to the look of a partridge breast.

The theory seems to be legitimate. You can tell a lot about the shape of a women's mouth.

Look at those lips- that girls got a partridge breast pussy!