1. a silly, foolish, or eccentric person
Usage: informal; often affectionate or playful
2. a round candy or lozenge, typically chocolate-covered
Usage: informal; chiefly North American

Examples

• My brother is such a goofball—he's always making jokes and doing silly dances.
• Don't be a goofball and actually pay attention in class.
• She's a goofball, but everyone loves her sense of humor.
• He grabbed a handful of goofballs from the candy dish.
• The kids were acting like goofballs at the party, running around and laughing.