g-tal
Someone who acts like they're the king of the world, even when they're just average.
My neighbor is a g-tal. He told me he was going to be famous even though he still lives with his mom.
My friend called me a g-tal because I said I was going to win the game, and I didn't.
My brother is a g-tal. He said he would beat me at video games, and he lost badly.