throwaway

throw·a·way

throwaway

a.
  1. designed to be discarded after a single use; disposable.
  2. spoken with deliberate underemphasis; as, a throwaway line in a play.

throwaway

n.
  1. an advertisement (usually printed on a page or in a leaflet) intended for wide distribution.
  2. words spoken in a casual way with conscious underemphasis.