n.
  - a sharp twist or curve in something linear. ▸a flaw or obstacle in a plan or operation. ▸a quirk of character or behaviour. 
- N. Amer. a crick in the neck.
v.
 form or cause to form a kink.
Etymology
  C17: from Mid. Low Ger. kinke, prob. from Du. kinken ‘to kink’.