Said of a design or revision that has been badly compromised by a requirement to be compatible with fossils or misfeatures in other programs or (especially) previous releases of itself. "MS-DOS 2.0 used \ as a path separator to be bug-compatible with some cretin's choice of / as an option character in 1.0."

[Jargon File]

Nearby terms:

buffer overrunbugbug-compatiblebug fixbug fix releaseBugfoot

Try this search on Wikipedia, Wiktionary, Google, OneLook.