Related Clues:

• Commit a blooper
• Drop a brick, so to speak
• Sail off-course, e.g.
• Go amiss
• "To __ is human ..."
• Jim Carrey often plays one
• Make a wrong move
• Do something wrong
• Commit 18-Down
• Wander off course, e.g.
• Flub it
• Jackass
• Betray fallibility
• Bungle the job
• Flub the shot, say