A term describing the unbearable burning feeling you get when you masturbate and then take a piss immediately afterwards. Don't pretend it's never happened to you.
Dude, I drank like four cups of coffee and then I saw that tall chick in a miniskirt. Long story short, I got firecock like you wouldn't believe.
Noun - A person having red hair both on the hair and in the pubic region. The fire pertains to the red in the hair, insinuating that women with red hair are fire in the bedroom.