e-tough guy
An e-tough guy is a man who thinks he's super strong and super cool because he plays online games. In real life, he's just a guy who can’t even stand up to his own brother. He yells at people online and says he can beat them up, even though he can't beat up his own cat.
In chat: You’re just a f***ing nobody who needs a f***ing snack and a nap. I’m gonna beat you up and steal your gold.
DM: I’m gonna come to your house and beat you up. I’ve got friends from the CIA, you f***ing loser.
In-game chat: You’re just a little f***ing shrimp who thinks he’s a tiger.