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Related Clues:
- Move imperceptibly
- Flow oh so slowly
- Move like honey
- Toxic waste, in some B movies
- Display in abundance
- Let out slowly
- Slimy stuff
- Seep (through)
- Creep through the cracks
- Move like flood mud
- Behave like lava
- Behave like lava out of a volcano
- Slimy semi-liquid
- Exit gradually, very gradually
- Drip like slime