A male or female who interferes with a female's attempts to get some sexual action. Similar to a cock blocker, except it's a vagina that's being blocked from action, hence the term "box."

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.

One who prevents a female from engaging in consensual sexual intercourse. Can be a male or female, but usually it is the latter. Analagous to cockblocker. From the slang word box.