1. A thin white or gray film of soap, dirt, and skin cells that accumulates around the shower, bathtub, or sink. I don't think the previous owners of this place ever cleaned their bathrooms properly. The soap scum in the bathtubs must have been an inch thick! This spray promises to wash away soap scum without any need to scrub!
2. An extremely repugnant, vile, wretched person. You're worse than a rat, worse than a maggot—you're nothing but soap scum! I would never let my daughter date soap scum like you!