sonicman69 

A joke that originates on the Misskey community of ActivityPub servers, refers to a sex act involving two hedgehogs (like those from the Sonic The Hedgehog franchise) 69-ing.

Oh damn, look they're really going at it-- not everyone can pull off the sonicman69!

sonicman69 by Bajax August 25, 2021

Sonicman 

Usually a black guy that is really weird and says very weird things.

Did you see that crazy stuff you said? He is such a Sonicman.

Sonicman by lolwut8373 August 22, 2012

Sonicman Moment 

When your computer has technical difficulties when playing a video game or Your Computer Bluescreens

Guy A: Oh fuck my computer blue screened
Guy B: Damn that’s a Sonicman Moment

Sonicman Moment by SonicMona March 23, 2021