A bitchy nerd. Someone who intensely focuses on any type of work for a period of time, disregarding everything else (including that person's social life).
Michelle did not go to the movies with her friends because she was being a berch.
Don't talk to me, I'm berching right now.
Oh my god, she is such a berch!
Let's berch today :)
I berched all night and I'm just so exhausted.
Berch is a slang term used to discribe young, slightly emo women, who are good only for short term sexual pleasures. The word itself derives from the derogatory term for women bitch.
"Berches for da brets" or "check out that prize berch".