[very common; back-formation from crufty]
1. n. An unpleasant substance. The dust that gathers under your bed is
cruft; the TMRC Dictionary correctly noted that attacking it with a broom
only produces more.
2. n. The results of shoddy construction.
3. vt. [from hand cruft, pun on ?hand craft?] To write assembler code for
something normally (and better) done by a compiler (see hand-hacking).
4. n. Excess; superfluous junk; used esp. of redundant or superseded code.
5. [University of Wisconsin] n. Cruft is to hackers as gaggle is to geese;
that is, at UW one properly says ?a cruft of hackers?.
The Free On-line Dictionary of Computing (30 December 2018):