The Collaborative International Dictionary of English v.0.48:

Jerk \Jerk\, v. t. [imp. & p. p. Jerked (j[~e]rkt); p. pr. &
   vb. n. Jerking.] [Akin to yerk, and perh. also to yard a
   measure.]
   [1913 Webster]
   1. To beat; to strike. [Obs.] --Florio.
      [1913 Webster]

   2. To give a quick and suddenly arrested thrust, push, pull,
      or twist, to; to yerk; as, to jerk one with the elbow; to
      jerk a coat off.
      [1913 Webster]

   3. To throw with a quick and suddenly arrested motion of the
      hand; as, to jerk a stone.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Jerking \Jerk"ing\, n.
   The act of pulling, pushing, or throwing, with a jerk. --
   Jerk"ing*ly, adv.
   [1913 Webster]

WordNet (r) 3.0 (2006):

jerking
    adj 1: lacking a steady rhythm; "an arrhythmic heartbeat" [syn:
           arrhythmic, jerking, jerky]
    n 1: an abrupt spasmodic movement [syn: jerk, jerking,
         jolt, saccade]

Moby Thesaurus II by Grady Ward, 1.0:

50 Moby Thesaurus words for "jerking":
   anhydration, blast-freezing, bottling, brining, canning,
   convulsive, corning, curing, dehydration, desiccation, dry-curing,
   drying, eclamptic, embalming, evaporation, fidgetiness, fidgets,
   fidgety, fitful, formication, freeze-drying, freezing, fuming,
   irradiation, itchiness, jerky, jiggety, jumpy, marination,
   mummification, orgasmic, pickling, potting, pruritus,
   quick-freezing, refrigeration, saltatory, salting, seasoning,
   smoking, spasmodic, spastic, stuffing, taxidermy, tinning,
   twitchety, twitching, twitchy, vellication, vellicative