coaster: n. 1. Unuseable CD produced during failed attempt at
writing to writeable or re-writeable CD media. Certainly related to
the coaster-like shape of a CD, and the relative value of these
failures. "I made a lot of coasters before I got a good CD." 2.
Useless CDs received in the mail from the likes of AOL, MSN, CI$,
Prodigy, ad nauseam.