Related Clues:

• Yup's alternative
• Informal denial
• Slangy refusal
• Slangy turndown
• '___ Help Myself' (Four Tops hit)
• It is countered with 'You must!'
• 'Forget it!'
• 'Don't think so'
• Conversation starter
• 'No way!'
• 'Huh-uh'
• Nah
• 'Nah!'
• Slangy denial
• 'Can't do it'