Possible Clues:

• "Impossible"
• 'Fuggedaboutit!'
• Slangy refusal
• Undo a chained dog, leaving every other — that's impossible
• That's not possible
• 'Not possible'
• That's out of the question!
• Informal expression of refusal
• What changes come to me? Nothing manageable
• Can't manage it, see doc anon