wart
A small, {crock}y {feature} that sticks out of an otherwise
{clean} design. Something conspicuous for localised ugliness,
especially a special-case exception to a general rule. For
example, in some versions of "csh(1)", single quotes
literalise every character inside them except "!". In ANSI C,
the "?" syntax used for obtaining ASCII characters in a
foreign environment is a wart. See also {miswart}.
[{Jargon File}]