It means to make things worse.

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 make a problem worse than it already is.

To make an existing situation much worse than before

To masturbate furiously, and to the point of utter exhaustion

To make worse or to worsen; opposite of helping

The term used to describe the practice of masturbating to exhaustion as a quality form of exercise.