Related Clues:

• "To ___ is human ..."
• Show you're human
• It may be done on the side of caution
• Prove one's humanity?
• Bozo
• Prove to be human?
• Need to be set straight
• Mess up
• "To ___ is human"
• Botch things
• Bobble a grounder, say
• Commit a faux pas
• Experience a brain cramp
• Waste time (with "off")
• Boob