what you say to your friend when they're complaining about females and/or relationships.
Bob: Dude this chick led me on for 5 hours in my own damn bed. She gets a text from her boyfriend and leaves me cold and blue balled man! fuck!
Ben: Bitches don't know!
by tahrone up in this bitch May 30, 2009
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1.A general use affirmative adjective/response for something that is mind-blowingly awesome, typically somethinng which the lady-folk cannot appreciate. Also used to insult bitches who don't know. See also: Fucking A or Hell yeah
2. The truth/words to live by
1. Guy 1- You wanna play Left 5 Dead?
Guy 2- Bitches don't know.

I was walking down the hall the other day and I overheard two bitchy girls discussing what they didn't know.

2. BDK!
by MuzzyFromDanviz March 23, 2010
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What one might say when another person makes you slightly(or considerably) annoyed.
You are standing in line and a lady screams at you to move to the back for her fair turn.

You reply with, "Bitch, I don't know your life!" and casually move to the back of the line.
by Lalaleah December 15, 2008
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