Just Some Guy without a Mustache is a God who you'll find on every good YouTube video you watch. There has been speculated that the only thing he does is watch YouTube and comment on every video for all eternity.
Person 1: boii I saw just some guy without a Mustache again. He had the top comment on the video I was watching.
Person 2: what? Again! He is everywhere these days!
the 2 CEO of just some guy organization where their main job is to comment on literally all the youtube videos you watch.
you probably will see these 2 guys on any youtube videos you watch.
your homie: hey do you have ever heard of just some guy without a moustache
you: he's literally everywhere on the comment section how I wouldn't know
12 step recovery jargon referring to someone new who talks about how great life is, now that they'resober. Usually meaning that the person is out of touch with reality.
The new guy seems pretty happy for a dude who has no job, no money and no family. He must be on a pink cloud.