Female equivalent of cock block. When a girl tries to prevent another girl from getting laid. Either a drunk biddie that doesn't know any better or just a trashbag that's jealous of you.
Person A - "Hey, what are you two doing out here all alone? I'm just gonna hangout with you all night!"
Person A - "So how did everything go with Harold last night?"
Person B - "Nothing happened because you wouldn't leave us alone"
Person A - "Oh shit, I choch-blocked you didn't I?"