Related Clues:

• Admonishing utterance
• Something best avoided
• Deed to avoid
• Something that's taboo
• Baby's taboo
• Tot's taboo
• Proscribed act
• Smoking while pumping gas, e.g.
• Fudge, to a dieter
• Thing we don't do
• Cake, on Atkins
• That which is not done
• Unwise act
• Thing to avoid
• Burping in public, e.g.