Related Clues:

• "Rats!"
• "Ghostbusters" goop
• "Ghostbusters" goo
• "Shoot!"
• Filth
• Algae, e.g.
• Sticky, wet stuff
• "Phooey!"
• Gunky stuff
• Nickelodeon gunk
• "Drat!"
• "Darn!"
• Viscous stuff
• Greasy stuff
• Filthy stuff