Related Clues:

• "Sorry about that!"
• 'Oops, sorry!'
• 'Accident!'
• Modern apology
• "I made a mistake," slangily
• 'Oopsy'
• "Oopsy"
• "I'm the culprit"
• Yank's admission of error -- admirably put right -- no liar involved
• 'I'm the culprit'
• "I goofed!"
• 'Whoops, sorry'
• 'Whoops, sorry about that!'
• "That's on me"
• 'Mea culpa'