Related Clues:

• Stated unequivocally
• Promised
• Insisted
• Vouched for
• Blasphemed
• Talked like a sailor, stereotypically
• Risked getting bleeped
• Risked an FCC fine
• Testified in court
• Talked X-ratedly?
• Took oath or cursed
• Uttered profanities or avowed
• The cursed South had this on
• Said some bad words
• Made a vow