The event of having sperm ejected out of the asshole propeled by way of a flatuent. This occurs after anal sex, that included ejaculation in the anus. The name is derived from the resemblence of the act to that of a natural water geyser, like old faithful, mixed with the hit Clash song Rock the Casbah.

A Bloomer is someone with a bright outlook on life who is optimistic in nature. Bloomer's frolic in every opportunity to be happy and try to make the most out of life. The opposite of a Bloomer is a Doomer. The term Bloomer originated specifically as a counter to the Doomer on sites especially like 4Chan.