"Don't try it, buster"

• Thumbs-down response
• Grunted comment meaning "No way!"
• "No way, José"
• "Nah!"
• ''Think again''
• "Not a chance"
• Head-shaking reply
• "Nothin' doin'"
• Mumbled denial

Wiktionary Word definitions in Wiktionary
interj. 1 (alternative form of uh-uh English) 2 (alternative form of uh-huh English)