Filthy or totally dirty.
Hackneyed (lacking significance through having been overused; unoriginal and trite)
Like a hack; amateurish.
Using, or characterised by, hacks: poorly designed workarounds.
Short and interrupted, broken, jerky; hacking.
Having a bad smell.
Having signs that suggest a design problem; having a code smell.
Having a quality that arouses suspicion.
a Short Magazine Lee Enfield rifle or one of its derivatives.