The last person, out of a group of friends, to have had sex with a new sexual partner. It is seen as a badge of honour, this because the "flag bearer" is often seen as the representitive of the groups sexual appeal and conquest as a whole.

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.