e-tough guy
An e-tough guy is a guy who lives in a fantasy world online, thinking he's the toughest person ever, but in real life, he’s just a guy who can't even stand up to his own mom. He yells at people online and says he can beat them up, even though he can't beat up his own dog.
In chat: You’re just a f***ing nobody who needs a nap and a snack. I’m gonna beat you up and steal your treasure.
DM: I’m gonna come to your house and beat you up. I’ve got friends from the CIA, you loser.
In-game chat: You’re just a little f***ing shrimp who thinks he’s a giant.