Get out! No way, Jose! Shut the front door! Holy crap! Scrape me off the ceiling, dude!
As in, your first time hearing a mind-blowing song, by someone you didn’t even know performed it.

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.