Definition

Australian (Sydney) slang for someone's name or nickname used in a casual, detached way. It's basically just a fancy word for 'what people call you,' but it slaps harder when you're Australian saying it.

Example Usage

That bloke's moniker is Snake, and honestly, he earned it after that incident at the pub.

Source: Urban Dictionary (https://www.urbandictionary.com/define.php?term=moniker&defid=75977)