1. something that moves very fast or operates at high speed
Usage: informal
2. a person who is exceptionally skilled or talented at something
Usage: informal
3. a spinning toy that makes a whizzing sound when spun

Examples

• The new sports car is a real whizzer on the highway.
• She’s a whizzer at solving math problems.
• The child spun the wooden whizzer until it hummed loudly.
• That computer is a whizzer compared to my old one.
• He’s a whizzer when it comes to playing chess.
• The toy whizzer flew through the air making a buzzing noise.