We're talking about something deeper than lacking social skills, "That guy" isn't the autistic coworker who blanks out when you attempt small talk. They're the coworker who toes the line of sexual harassment, or who calls their coworkers idiots. It's the person who hears someone brought doughnuts and rushes to eat twice their fair share. A common variant is the person who needs to constantly assert that they're the smartest person in the room, not just by hyping themselves up, but by putting others down. Maybe they eat incredibly pungent food at their desk while others are working. They may repeatedly bring up divisive politics in front of coworkers they know disagree with them.

Yeah I had a job with two of them for a while. Meanwhile my boss was probably autistic and possibly my personally favorite boss I've ever had. Didn't know much about him, but he was always happy to help whoever needed it and treated his subordinates with respect and kindness.

And yeah lemmy has a fair handful of them, but also the internet encourages bad behavior