Related Clues:

• Verboten act
• Forbidden practice
• Turn the air blue
• Unmentionable
• 'May you live in interesting times,' e.g.
• Affliction
• Evil spell
• Say '@#$%!'
• Source of trouble
• Not allowed
• Imprecate
• Something not to talk about
• Poison
• Execration
• Like a divorce, in some places