A woman (or "bitch") who is only good for cooking and/or baking in the kitchen. Especially biscuits.
Girl: "Hey guys, I lost my job at that office today.."
Guy #1: "I'm sorry."
Guy #1 whispers to guy #2: "Told you, woman who's not a secretary, doesn't belong in the office."
Girl: But I made my famous Chicken Alfredo with mashed potatoes!
Guy #2: "...she's such a bitchscuit."