lint

Etymology 1

From Middle English lynet, linet, from Old French linette (“grain of flax”), diminutive of lin (“flax”); or, from Medieval Latin linteum, from Latin līnum (“flax”).

noun

1. Clinging fuzzy fluff that clings to fabric or accumulates in one's pockets or navel etc.
   Clean the lint out of the vacuum cleaner's filter.
2. A fine material made by scraping cotton or linen cloth; used for dressing wounds.
3. The fibrous coat of thick hairs covering the seeds of the cotton plant.
4. Raw cotton ready for baling.

Etymology 2

From the lint Unix utility, written in 1979, which analyses programs written in the C language, itself named after the undesirable bits of fiber and fluff found in sheep's wool (see etymology 1).

verb

1. (transitive, computing) To perform a static check on (source code) to detect stylistic or programmatic errors.
   You should lint your JavaScript code before committing it.