Though used in daily speech, little is actually known about the flying fuck. Native to Africa, this flightless bird tends to be secretive and rarely allows itself to be visible, hence, examining it in it's natural habitat is nearly impossible. Due to their extreme lack of activity within the community, they were considered a rare commodity throughout several African villages. The term "I don't give a flying fuck" Originally meant that you could not put a price on such a item or service, but after translation and over use, the statement now means the exact opposite of this.
Jimmy left his flying fuck in the wagon, and now he has none. He can no longer give a "flying fuck", as he has none.