an abbreviation for just playing. usually said after doing something really obnoxious, because it cancels everything out.

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.

To be mackin on youngins.

The same thing as JK or "just kidding." Used for saying you are not serious.