Related Clues:

• Viscous mud
• Sludgy substance
• It's icky and sticky
• Unappetizing food
• Wet dirt
• Word from the crib
• Unappetizing bowlful
• 'Ghost-busters' gunk
• Yucky muck
• Scum
• Sticky mud
• Hard-to-identify food
• Gunky buildup
• Moo __ gai pan
• Crude oil, e.g.