Promiscuous. It is meant to suggest that the girl -or guy- in question tips backwards easily i.e. is ready for sexual intercourse in the missionary position

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.

n: A promiscuous person, usu. a promiscuous female. See "slut", etc.

More commonly used in the 1950's, this term has fallen into general disuse, but may still be heard in fiction that takes place in that era, or in circles that consider retro-talk cool.

somebody who doesn't mind about having sex with everybody