1: When you are lying back slightly in your parked car on a nice summers day with the windows down, while eating a double cheeseburger and slowly begin to dose off and lye your cheese burger on your chest. Only then to be startled by a bum giving you a handjob with one hand to sooth you while attempting to steal the cheeseburger off your chest.

2: A person who is always overly hungry, so much so that they would steal someones food in reference to definition 1.

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.