1. A male who posesses homosexual tendencies, such as dressing like a flaming homosexual.

2. An insult for a male heterosexual, usually done by a homosexual.

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.