Related Clues:

• Something in a pen
• Slob
• Muppet Rizzo, e.g.
• Plague carrier
• Dirty dog
• Nocturnal rodent
• Untrustworthy one
• Greedy sort
• Nonsharing type
• Lab maze runner
• Untrustworthy sort
• It may be down in the dumps
• Snitch (on)
• Pot-bellied pet
• Renegade