Reraise all-in is a combination poker term. Reraise means to raise a player who has already raised the initial bet. For instance, if player A bets 100, player B raises to 200, then Player A can has the option to raise again, this second raise is called a reraise. An All-in is a poker term meaning a player has all of his chips in the pot and does not have anymore to bet with. To reraise all-in is to make the second raise while pushing the rest of your chips into the pot. The All-in Reraise is the maximum amount of chips you can reraise with because you will not have anymore chips left since you are all-in