Used in expressing extreme joy or happiness; satisfaction.

Originated from expressing hysterical joy, and using the term radical to describe dirtbikes. The phrase "radical dirtbikes" eventually grew to mean feeling extreme joy over anything.

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.