Related Clues:

• Parasitic insect
• It might make you a nit-picker
• Emptiness
• Despicable sort
• There's nothing in here
• Wingless insect
• Despicable person
• Bloodsucker
• Empty space
• Nogoodnik
• Insect
• Dirt-removal tool
• Dirty dog
• Contemptible fellow
• Wingless bloodsucker