kink

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A tight curl, twist, or bend in a length of thin material, as one caused by the tensing of a looped section of wire.
• noun A painful muscle spasm, as in the neck or back; a crick.
• noun A difficulty or flaw that is likely to impede operation, as in a plan or system.
• noun A mental peculiarity; a quirk.
• noun An unusual or eccentric idea.
• noun Slang Peculiarity or deviation in sexual behavior or taste.
• intransitive & transitive verb To form or cause to form a kink or kinks.

from The Century Dictionary.

• noun A knot-like contraction or curl in a thread, cord, or rope, or in a hair, wire, or chain, resulting from its being twisted or doubled upon itself, or from the nature of the material. Also kinkle.
• noun An unreasonable and obstinate notion; a crotchet; a whim.
• To form kinks; twist or contract into knots.
• To become entangled: said of a line.
• noun A convulsive fit of coughing or laughter; a sonorous indraft of the breath; the whoop in whooping-cough; a gasping for breath caused by coughing, laughing, or crying.
• To laugh loudly.
• To gasp for breath as in a severe fit of coughing: especially applied to the noisy inspiration of breath in whooping-cough.

from the GNU version of the Collaborative International Dictionary of English.

• noun Scot. A fit of coughing; also, a convulsive fit of laughter.
• noun 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.
• noun colloq. An unreasonable notion; a crotchet; a whim; a caprice.
• intransitive verb To wind into a kink; to knot or twist spontaneously upon itself, as a rope or thread.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• verb To laugh loudly.
• verb To gasp for breath as in a severe fit of coughing.
• noun A convulsive fit of coughing or laughter; a sonorous indraft of breath; a whoop; a gasp of breath caused by laughing, coughing, or crying.
• noun A tight curl, twist, or bend in a length of thin material, hair etc.
• noun A difficulty or flaw that is likely to impede operation, as in a plan or system.
• noun slang Peculiarity or deviation in sexual behaviour or taste.
• noun Scotland, dialect A fit of coughing or laughter.
• noun mathematics A positive 1-soliton solution to the Sine–Gordon equation
• verb transitive To form a kink.
• verb intransitive To be formed into a kink.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• verb form a curl, curve, or kink
• noun a person with unusual sexual tastes
• noun a difficulty or flaw in a plan or operation
• noun a painful muscle spasm especially in the neck or back (`rick' and `wrick' are British)
• noun a sharp bend in a line produced when a line having a loop is pulled tight
• noun an eccentric idea
• verb curl tightly