When a girl generally wearing a tube top or even one of your friends who happens to look expecially slutty any given day appears to have taken a bath in "slut." On occastion a slut bath might not appear to have taken a bath in slut until you see her hitting on every boy at the party including your boyfriend.

When you're neighbors are playing kick ball in the street and yelling obsenities at 3 in the morning and you're sober and have to work the next morning.