Related Clues:

• Butler's famous last word
• 'Well, whaddaya know!'
• 'I'll be a monkey's uncle!'
• "Check that out!"
• 'Well played!'
• Right, to Black Beauty
• "Hmm . . ." to Theodore Cleaver
• Word before "whiz" or "willikers"
• Enthusiastic sound
• Back-scratchee's reaction
• "___ willikers!"
• '___ straight!'
• Eye-popper response
• Hoot?
• "Unbelievable!"