Related Clues:

• ''That's the truth!''
• 'That's the truth!'
• 'It's the truth'
• ''Really!''
• "Really!"
• ''And that's ___'' (''Believe you me'')
• "I kid you not"
• 'You have got to be kidding!'
• Jack Paar catchphrase
• Response to a disbeliever
• "I swear!"
• 'Honestly!'
• "I'll swear on a stack of Bibles!"
• 'For realz'
• "Cross my heart"