Related Clues:

• Dirty money
• Grunge
• Icky stuff
• Dinero
• "Rats!"
• "Filthy" stuff
• "Shoot!"
• Filth
• "Phooey!"
• Gunky stuff
• Filthy stuff?
• "Drat!"
• Stubborn dirt
• "Darn!"
• Cleaners' concern