Related Clues:

• '___ so fast!'
• ''So there!''
• Negator's word
• Quaint oath
• Sound of a dud
• ''Yeah, sure!''
• 'Puh-leeze!'
• ''Nonsense!''
• ''You wish!''
• ''Fiddlesticks!''
• 'That's a laugh!'
• Guaranteed
• Skeptic's remark
• Triumphant cry
• But of course