1. a female given name
Usage: proper noun; common in English-speaking countries
2. a silly or foolish person
Usage: informal; chiefly British

Examples

• Nelly was named after her grandmother.
• Don't be such a nelly about trying new things.
• He acted like a right nelly when he forgot his lines.
• Not on your nelly! I won't agree to that.
• She's no nelly—she's quite clever actually.