A formal nickname for people named StudiousSquid who thinks he’s so tasty but is like one of them rotten eggs types. They tend to talk a bunch of nerd crap like vortexes, aliens, and math but are supreme at hacking and chess.
To be illustrious, this means you are one of the town. You are a well known being in said area because an old folktale speculated that Illustrious people poop rainbow coloured gold.
She's so illustrious, I once saw her behind the bushes in Tonbridge dumping one out. It was rainbow.