Carpet itch
When a guy or girl has a nasty std that makes their pubic hair itch :P
Todd: I met this girl at the bar yesterday and when we we got to my house and we were about to have sex she was scratching down there
Sal: Eww that bitch had a carpet itch
Todd: Damn, thank God I told her she had to leave
Sal: Eww that bitch had a carpet itch
Todd: Damn, thank God I told her she had to leave