1. A group of hot girls who wear extremely revealing clothes in front of guys, flirting
constantly and driving guys crazy because they won't go out with any of them.
2. A group of girls who intentionally make it difficult to pick up one of their "friends
3. A group of feminist bitches.
1. "Hey, Mike are you going to try to get laid again?"
"No, I heard those girls are a bitch bash."
2. "Bro, you should ask Marla out now, the dance is tomorrow!"
"I can't, she's in the middle of a bitch bash"
3. (Protesting about womens soccer) "Look at that bitch bash, don't they realize no-one gives a shit about their dried-up old vaginas