Warranting erection.

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.

An adjective to use when a girl isn't exactly HOT per se, but she still sort of gives you a chub.

As a male, it is something the inspires an erection (a chub). Boner