moniker

noun
UK /ˈmɒn.ɪ.kər/
US /ˈmɑː.nɪ.kɚ/

A moniker is a name or nickname that people call you.

His friends gave him the moniker "Speedy" because he runs so fast.


OTHER MEANINGS

2. A humorous or informal name used instead of a real name.

The old ship earned the moniker "The Rusty Bucket" from its crew.

3. A name used to identify a person in a particular group or online.

Her gaming moniker is well known among players.

4. A descriptive word or phrase attached to someone because of a trait.

The mayor picked up the moniker "Mr. Fix-It" after repairing the town park.