"Pulling a Fergie" pulling a Fergie is when two or more people are having a conversation, then the conversation ends, and out of no where some one, not involved in the conversation, butts in and says.. "What?"
Person #1: "So I'm getting that lift kit this weekend"
Person #2: "Nice, need help putting it on?"
Person #3: "What? what you guys talking bout?"
Person #1: "God damnit! Way to pull a Fergie