when one sticks their finger up your own butthole, or anothers butthole, preferably the other gender...but who knows, and when one pulls out such finger, there is butt fecal matter remaining on the once inserted finger, causing the finger to be a "poo poo fingah", then one must point finger upward to initiate the "poo poo fingah"

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.