Related Clues:

• Crab
• Chronic complainer
• Grumbler
• Curmudgeon
• Grumpy person
• Bellyacher
• Oscar, for one
• Oscar of "Sesame Street," e.g.
• Sesame Street's Oscar, e.g.
• 'Crosspatch, grump (6)'
• A bad-tempered person
• Whinger's great cry of pain
• Grumbler - gripe
• Person continually grumbling
• Complain(ing person)