cup holder: n. The tray of a CD-ROM drive, or by extension the
CD drive itself. So called because of a common tech support legend
about the idiot who called to complain that the cup holder on his
computer broke. A joke program was once distributed around the net
called "cupholder.exe", which when run simply extended the CD drive
tray. The humor of this was of course lost on people whose drive had
a slot or a caddy instead.