Related Clues:
- Scummy deposit
- Icky accumulation
- Disgusting material
- Icky incrustation
- Too-foul stuff
- Smutty material: this should be cleaned up!
- Filthy gunk
- Scrubbed-off stuff
- Hotel niff picked up on odd occasions, result of lack of cleaning?
- Nonsense, and vulgar, mostly
- Gunky, mucky, semi-solid stuff
- Foul substance (informal)
- Pig playground
- Yucky buildup
- Twenty per cent disheartened about lake pollution