Unlike a "Bee hatch" (a hatch in a beehive), Beehatch is a nicer way to saythe word BITCH, which could either be a female dog, or a whore/cunt of a woman (=bad female).
It's also a way to get your point across past the censors on chats, and forums.
She's a B*** man!
Hey! What the F***! I did not say any M***F***ing ***!
What the F*** are all these stars for?
Hey, calm down dude! It's just the site's censoring!
Beehoo is a word that is meant to describe something that is confusing. The defention itself is very confusing. It means everything and nothing at the same time. So like if you don't know what to say you can just say beehoo.