Whizzski 

Commonly known as humanity's worst streamer. Rose to fame through cheating in video games when playing against another, far more popular, streamer called KristianKrake. KristianKrake still outshines him to this day, even though he vanished from Twitch and YouTube.
The only thing Whizzski ever did successfully was convincing everyone he had a girlfriend. To this day, critics -which in his case are everyone on earth and in an area of 24 light years in diameter around it- claim her face and voice were and are deep faked.

A: "Have you ever heard of a guy called Whizzski?"
B: "I somehow only have a deeply ingrained memory of him in KristianKrake's kill feed..."

or

A: "Do you know who Whizzski is?"
B: "I would rather die than know him."

Whizzski by Thomaso von Matterhorn October 15, 2022

whizzkid 

What complete twats call themselves in the mistaken belief that they are somehow cool or intelligent.

"Lee Martin sits in his fetid bedroom all day wanking over his Hornby train set and making up bullshit stories whilst covered in dog fleas and nursing bruises from the last beating his fat pikey dad gave him, and he still has the nerve to call himself a whizzkid"

whizzkid by Dissibblerwobbler September 9, 2003