You're probably familiar with the verb to "flap," which is what birds do with their wings. But as a noun, a flap is a fuss, an argument, or a gossipy feud.
A big part of the pleasure of reality TV shows is watching how quickly a person can start a flap. A dumb remark, a furtive glance, a missed phone call: any of these things can start the characters bickering. And the flap can go on for an entire season! One way to remember the meaning of the verb to flap is to imagine the sound of many wings flapping. That's the sound a flap might make if you could hear it. The leak from the senator's press agent might have caused a firestorm. Instead it resulted in just a minor flap.