Related Clues:

• Slip-up
• Screw up
• Goof up
• Make a boo-boo
• Make a blunder
• Blow one's lines
• Blow, as one's lines
• Err
• Bollix up
• Careless mistake
• Execute poorly
• Embarrassing error
• Blow, as a line
• Bit for the blooper reel
• Silly error