Related Clues:

• Attest
• You might do it up and down
• Say with one's hand on the Bible
• Give an oath
• Say '#@%!'
• Say *@#!&*!
• Invoke the FCC's wrath
• Incense the censor
• Use profane language
• "Solemnly" follower
• Take a vow
• Take a pledge
• Say four-letter words
• Avoid the euphemisms
• Utter obscenities or take an oath