Related Clues:

• Words of warning
• 'No kidding!'
• 'Really!'
• 'Don't play with me!'
• 'Truly!'
• 'I swear!'
• 'And that's ___' ('Believe you me')
• 'Really?'
• 'No kidding'
• 'I'm telling the truth!'
• 'This is no joke!'
• 'I'm not kidding!'
• ''It's the truth''
• God's honest truth
• 'It's the truth!'