Related Clues:

• A serious matter
• Oil spillage in Tyne and Wear - it's the absolute truth!
• Judge agreement to cut Christmas short a serious matter
• Difficult matter that isn't funny
• Serious or difficult matter
• "You've got to be kidding me!"
• ''I swear!''
• "God's honest truth"
• 'Surely you're joking!'
• 'True dat!'
• ''Seriously!''
• 'You can't be serious'
• 'I'm not playin''
• 'Cross my heart!'
• 'Dead serious!'