An exploderverse (EXPV) is a universe where everything gets hot. Noting is safe, not even black holes. In this Universe, you do not want to hang out in any part of the Universe. Any part that isn't hot will soon become hot. At least of any hot temperature, mostly the planck temperature.
It can be considered to be the opposite of an Omegaverse, as in an Omegaverse everything tends towards coldness and in an exploderverse everything tends towards heat. The Exploderverse is in a multiverse called the Temperatureverse. It is the 3rd worst verse ever.