whizzer

/ˈwɪz ər/
noun
  1. A person or thing that whizzes, especially something that spins or moves very fast.
    • He's a whizzer on the basketball court, dribbling past everyone.
    • The toy top was a little whizzer that spun for minutes.
    • The new blender is a real whizzer, making smoothies in seconds.
  2. A type of spinning toy or device.
    • He built a simple whizzer from a button and a string.
    • Kids played with whizzers in the park, watching them spin on the ground.
    • The whizzer made a humming noise as it rotated faster and faster.
Synonyms