plural of throwaway

Disposable; intended for a single use prior to being discarded. / Extemporaneous; off the cuff. / Given in a casual manner, either deliberately or unconsciously, with apparent disregard for effect.

Something temporary and disposable. / (Internet) A burner account.

(aviation) The purchase of a ticket with the intent to use only a portion of the included travel, in order to save on airfare.