An act which serves to put someone in an extremely undesirable position or the state of being placed in said undesirable position.
It was raining and I got a flat tire. My cell phone was dead and when I popped the trunk I discovered that the spare was flat too. I was totally "bitchfucked".
If someone says they will do something and you say "Bitchrule" then that person has to do this thing and if they fail or do not do this task they take a punch/kick the the nuts/vagina. There is also the retracted rule witch is how the person who said bitchrule can get rid of it. The bitchrule can not be said after too much time has passed.