look up any word, like bukkake:
Bitch week: Refering to the week a woman is on her cycle/ monthly period...

mostly a term used by guys because when a girl is on her cycle they always say that the girl is acting like a total bitch and is a hormonal wreck when approached...

They most likely will be in a better mood if you give her chocolate to consume and do everything she says....

never mess with a girl on her bitch week.... you will regret it
Person A: "Hey dude whats wrong with your girlfriend this week? all she does is yell and demand stuff?"

Person B: "Dude! shes on her BITCH WEEK! i keep giving her chocolate to calm her down and its not working!!!!"

Person A: "DUDE! YOUR SKREWED!!!!"
by MusicxFreakk December 27, 2012