The Collaborative International Dictionary of English v.0.48:

Jerk \Jerk\ (j[~e]rk), v. t. [Corrupted from Peruv. charqui
   dried beef.]
   To cut into long slices or strips and dry in the sun; as, to
   jerk beef. See Charqui.
   [1913 Webster]

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:

Jerk \Jerk\, v. i.
   1. To make a sudden motion; to move with a start, or by
      starts. --Milton.
      [1913 Webster]

   2. To flout with contempt.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Jerk \Jerk\, n.
   [1913 Webster]
   1. A short, sudden pull, thrust, push, twitch, jolt, shake,
      or similar motion.
      [1913 Webster]

            His jade gave him a jerk.             --B. Jonson.
      [1913 Webster]

   2. A sudden start or spring.
      [1913 Webster]

            Lobsters . . . swim backwards by jerks or springs.
                                                  --Grew.
      [1913 Webster]

   3. A foolish, stupid, or otherwise contemptible person.
      [Slang]

   Syn: jerkoff.
        [PJC]

   4. (Sport) The lifting of a weight, in a single rapid motion,
      from shoulder height until the arms are outstretched above
      the head; distinguished from press in that the motion in
      a jerk is more rapid, and the body may be moved under the
      weight to assist completion of the movement; as, a clean
      and jerk of two hundred pounds.
      [PJC]

   2. Calisthenic exercises, such as push-ups or deep knee
      bends; also called physical jerks. [British]
      [PJC]

WordNet (r) 3.0 (2006):

jerk
    n 1: a dull stupid fatuous person [syn: jerk, dork]
    2: an abrupt spasmodic movement [syn: jerk, jerking, jolt,
       saccade]
    3: (mechanics) the rate of change of acceleration
    4: meat (especially beef) cut in strips and dried in the sun
       [syn: jerky, jerked meat, jerk]
    5: raising a weight from shoulder height to above the head by
       straightening the arms
    6: a sudden abrupt pull [syn: tug, jerk]
    v 1: pull, or move with a sudden movement; "He turned the handle
         and jerked the door open" [syn: yank, jerk]
    2: move with abrupt, seemingly uncontrolled motions; "The
       patient's legs were jerkings" [syn: jerk, twitch]
    3: make an uncontrolled, short, jerky motion; "his face is
       twitching" [syn: twitch, jerk]
    4: jump vertically, with legs stiff and back arched; "the yung
       filly bucked" [syn: buck, jerk, hitch]
    5: throw or toss with a quick motion; "flick a piece of paper
       across the table"; "jerk his head" [syn: jerk, flick]

Moby Thesaurus II by Grady Ward, 1.0:

213 Moby Thesaurus words for "jerk":
   SOB, anhydrate, ass, asshole, backslide, bastard, blast-freeze,
   bob, bobble, boob, booby, bounce, bowl, brine, bugger, bump, cast,
   catapult, chuck, chump, chunk, cock, corn, creep, cure, dart, dash,
   dehydrate, desiccate, didder, ding-a-ling, dingbat, dingdong,
   dither, dope, drag, dry, dry-cure, dry-salt, embalm, evaporate,
   fall astern, fall behind, falter, fart, fidget, fire, flick, fling,
   flip, flip out, flirt, flounce, flutter, fool, fork, freak out on,
   freeze, freeze-dry, fume, galoot, get behind, get high on, glow,
   go backwards, go behind, go pitapat, goof, grimace,
   have the fidgets, have the shakes, heave, heel, hitch, hood,
   hooligan, hurl, hurtle, idiot, imbecile, irradiate, itch, jackass,
   jar, jerk back, jerk-off, jig, jigger, jigget, jiggle, jog, joggle,
   jolt, jostle, jump, kipper, klutz, lance, lapse, launch, let fly,
   lob, lose ground, louse, lug, lurch, marinade, marinate, meanie,
   moron, mother, mummify, mutt, nerd, nincompoop, ninny, nip,
   palpitate, pant, pass, peg, pelt, pickle, pill, pitch, pitchfork,
   pluck, preservatize, prize sap, pull, pull back, put, put the shot,
   quake, quaver, quick-freeze, quiver, rat, recede, recidivate,
   refrigerate, regress, relapse, retrocede, retroflex, retrograde,
   retrogress, return, revert, rictus, salt, sap, saphead, sawney,
   schlemiel, schmuck, season, serve, shake, shit, shithead, shitheel,
   shiver, shock, shudder, shy, sling, slip back, smoke, smoke-cure,
   snake, snap, snatch, squirm, start, stinkard, stinker, stuff,
   sudden pull, swell, swell with emotion, thrill, thrill to, throb,
   throw, tic, tilt, tingle, tingle with excitement, tomfool, toss,
   toss and turn, tremble, tremor, tug, tumble, turd, turn on to,
   tweak, twist, twist and turn, twitch, twitter, vellicate, wiggle,
   wobble, wrench, wrest, wriggle, wring, writhe, yank, yerk