Any very unusual character,
particularly one you can't type because it isn't on your
keyboard. MIT people used to complain about the
`control-meta-cokebottle' commands at SAIL, and SAIL people
complained right back about the `escape-escape-cokebottle'
commands at MIT. After the demise of the space-cadet keyboard, `cokebottle' fad
often invoked humorously to describe an (unspecified) weird or
non-intuitive keystroke command. It may be due for a second
inning, however. The OSF/Motif window manager, mwm(1), has
a reserved keystroke for switching to the default set of
keybindings and behavior. This keystroke is (believe it or not)
`control-meta-bang' (see bang). Since the exclamation point
looks a lot like an upside down Coke bottle, Motif hackers have
begun referring to this keystroke as `cokebottle'. See also
quadruple bucky.