Related Clues:

• Drop the ball, e.g
• Eff up
• Misspell or misspeak
• Goof or go off
• Make a typo
• Guess wrong, say
• Suffer a "brain cramp"
• Hit a sour note
• Exhibit fallibility
• Make a blooper
• Leave the righteous path
• Slip or trip
• Boot the ball
• Demonstrate one's humanity
• Come up with a wrong number