funky

funky adj.  Said of something that functions, but in a
   slightly strange, klugey way.  It does the job and would be
   difficult to change, so its obvious non-optimality is left alone.
   Often used to describe interfaces.  The more bugs something has
   that nobody has bothered to fix because workarounds are easier, the
   funkier it is.  {TECO} and UUCP are funky.  The Intel i860's
   exception handling is extraordinarily funky.  Most standards
   acquire funkiness as they age.  "The new mailer is installed, but
   is still somewhat funky; if it bounces your mail for no reason, try
   resubmitting it."  "This UART is pretty funky.  The data ready
   line is active-high in interrupt mode and active-low in DMA mode."