Related Clues:

• Unpleasant sticky material
• Sticky material
• Sticky goo
• Residue in a bathtub drain
• Accumulated muck
• Mostly offensively coarse nonsense
• Caked-on dirt
• Unpleasant buildup
• Gross muck
• Filthy buildup
• 'Oh, fudge'
• Caked filth
• Caked-on buildup
• Garage goop
• Engine gunk