whiz
nounUK /wɪz/
US /wɪz/
A whiz is someone who is very good at something.
My sister is a whiz at math.
OTHER MEANINGS
2. To move very fast with a humming sound.
The arrow whizzed past our heads.
3. A humming or buzzing sound.
We heard the whiz of a firework.
4. A short way to say wizard.
The whiz waved his magic wand.