e-badass
A fake tough guy who posts threats on the internet like they're going to come to your house and beat you up, but they're just a lazy person who doesn't want to do real work.
You said you'd beat me up? I'm still waiting. You're just a fake tough guy.
You post threats on forums like you're some kind of legend, but you can't even beat me in a game.
You're like a dog who barks at the mailman but runs away when the mailman comes.