Related Clues:

• Forbidden subject
• Canceled, slangily
• Taboo action
• Impossible
• A doofus might do it
• With 36-Down, 1925 Broadway hit
• Taboo temptation
• Admonishment to Nanette
• Something prohibited
• Taboo practice
• It's inadvisable
• Scrubbed, as a mission
• Improper act
• Sticking a fork in the toaster, e.g.
• Toddler's taboo