The highly sought after response to a meaningless question to prove that your boy/girlfriend really is paying no attention to you. "Bopples" can only be used when the unfocused individual answers with "what?". Used in relationships to maintain focus on inter-communication.
Boyfriend is sitting on the couch, watching THE football game on Sunday afternoon.
Girlfriend: "Sweetheart, did you hear what President Bush said about sweet potatoes and fishing lures being used to perform open heart surgery?"