fire crotch- someone with red pubic hair

usually refers to a guy

someone's who has orange pubic hair, you can usually tell if someone is a frotch if their eyebrows are orange.

The conjunction of fire crotch.

One who has red hair and thus having red pubes or a "fire crotch"

fire + crotch = frotch

someone who has very orange hair

a red headed person, refering to ones color of red pubic hairs

a person with red hair, generally red pubic hair