1. [n]  a sharp bend in a line produced when a line having a loop is pulled tight
2. [v]  form a curl, curve, or kink; "the cigar smoke curled up at the ceiling"; "The road curved"
3. [v]  put a kink in
4. [v]  curl tightly, of hair

Kink
Bakos delves into fascinating and elaborate subcultures that revolve around different forms of kink--from the suburban bedrooms of couples who seem normal to sex clubs and private rooms where domination and submission in all variations is carried out for those who can`t, or don`t, get enough at home. Martin`s Press.

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1. \Kink\, n. [D. kink a bend or turn, or Sw. kink.]
   1. A twist or loop in a rope or thread, caused by a
      spontaneous doubling or winding upon itself; a close loop
      or curl; a doubling in a cord.
   2. An unreasonable notion; a crotchet; a whim; a caprice.
      [Colloq.] --Cozzens.
   

2. \Kink\, v. i. [imp. & p. p. {Kinked}; p. pr. & vb. n.
   {Kinking}.]
   To wind into a kink; to knot or twist spontaneously upon
   itself, as a rope or thread.
   

3. \Kink\, n. [Cf. {Chincough}, {Kink-haust}.]
   A fit of coughing; also, a convulsive fit of laughter.
   [Scot.]