Related Clues:

• Be stupid, but not on purpose
• Drop a fly ball, e.g
• 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