noun

1. Something temporary and disposable.

adjective

1. Disposable; intended for a single use prior to being discarded.

   “As the film opens, a martial-drum-dominated version of the "Star Wars" theme and the inevitable bottom-to-top print crawl inform us that the Clone Wars, a conflict that originated as a throwaway line in the original 1977 film... http//www.nysun.com/arts/star-wars-clone-wars-painted-in-the-stars/83922/”

2. Extemporaneous; off the cuff.

   “The host made a throwaway remark about the president that was later repeated on the television news.”

3. Selected or used without care or attention.

Synonyms: disposable, single-use