the.com/kink

A personal preference or quirk, often sexual, that falls outside what's considered conventional.

means A quirk, twist, or unconventional preference — originally a literal bend in rope or wire, now mostly used for the mental kind you reveal at the worst possible dinner party.

from From an old Low German/Dutch word, 'kink,' meaning a twist or curl in a rope — sailors used it for the tight little loops that formed when a line was twisted against its nature. English borrowed it in the 1800s for literal kinks (in hoses, necks, hair), then stretched it metaphorically to mean a quirk or flaw in a plan or personality. The sexual sense is the newest twist, emerging in the 1900s — the idea being a preference 'bent' away from the straight and narrow, which, fittingly, is the exact shape the word started with.

origin
literally means a twist in rope, 1800s sailor slang
key rule
Consent is essential; without it, an act is not kink but abuse
misconception
having one doesn't mean you're broken, just specific
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