Related Clues:

• Disgustingly foul substance
• Skiing slang for gluey half-melted snow
• Nasty buildup
• Accumulated muck
• Mostly offensively coarse nonsense
• Caked-on dirt
• Gross muck
• Filthy buildup
• 'Oh, fudge'
• Caked filth
• Caked-on buildup
• Engine gunk
• Crusty buildup
• Mucky gunk
• Filthy accumulation