Possible Clues:

• 'Yeah, like that'll ever happen'
• "Like that'll ever happen!"
• That's unlikely! (colloquial)
• Skeptical response
• "Don't you wish!"
• "It'll never happen!"
• Soldiers stopping homeless person getting a lift? Come off it!
• ''You wish!''
• 'Yeah, that'll happen!'
• 'Yeah, sure!'