Complete the rainbow is the action of having sexual intercourse with one or more individuals from each of the fraternities on campus. Leaving this way, an entire variety of fraternity colors, like a rainbow.

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.