Related Clues:

• Mud
• Sticky gunk
• Filth
• Sticky, wet stuff
• Gunky stuff
• Viscous stuff
• Greasy stuff
• Grime
• Slimy mud
• Wet dirt
• Yucky muck
• Tar, e.g.
• Mucky stuff
• Icky or sticky stuff
• Slimy stuff