WordNet (r) 3.0 (2006):

shake up
    v 1: shock physically; "Georgia was shaken up in the Tech game"
         [syn: jar, shake up, bump around]
    2: organize anew; "We must reorganize the company if we don't
       want to go under" [syn: reorganize, reorganise, shake
       up]
    3: shake; especially (a patient to detect fluids or air in the
       body) [syn: succuss, shake up]
    4: stir the feelings, emotions, or peace of; "These stories
       shook the community"; "the civil war shook the country" [syn:
       stimulate, shake, shake up, excite, stir]
    5: change the arrangement or position of [syn: agitate, vex,
       disturb, commove, shake up, stir up, raise up]
    6: make fuller by shaking; "fluff up the pillows" [syn: fluff
       up, plump up, shake up]

Moby Thesaurus II by Grady Ward, 1.0:

208 Moby Thesaurus words for "shake up":
   abate, accelerate, accuse, action, ad hoc measure, agitate,
   anathematize, anathemize, animadvert on, answer, arouse, arraign,
   artifice, attenuate, awake, awaken, beat, beat up, blame, blunt,
   call to account, cast blame upon, cast reflection upon, censure,
   churn, churn up, clean sweep, cleanup, complain against, condemn,
   contrivance, convulse, countermove, coup, course of action, cramp,
   cripple, cry down, cry out against, cry out on, cry shame upon,
   cushion, damn, damp, dampen, deaden, debilitate, decry, demarche,
   denounce, denunciate, device, devitalize, disarrange,
   discombobulate, discompose, disconcert, disquiet, disturb, dodge,
   dull, ease, effort, electrify, enervate, enfeeble, eviscerate,
   excite, exhaust, expedient, extenuate, ferment, fluff, flurry,
   fluster, flutter, fret, fulminate against, fuss, gentle, gimmick,
   gruel, hasten, hurry, impeach, improvisation, impugn, indict,
   inveigh against, jar, jolt, jury-rig, jury-rigged expedient, knead,
   knock up, last expedient, last resort, last shift, laxate, lay low,
   limber, limber up, liquidation, loosen, makeshift, maneuver, mash,
   massage, means, measure, mellow, milden, mitigate, mollify, move,
   overturn, paddle, perturb, perturbate, pis aller, plump, pulp,
   purge, quicken, rattle, realign, realignment, rearrange,
   rearrangement, reconstitute, reconstitution, redispose,
   redisposition, redistribute, redistribution, reduce, reflect upon,
   relax, removal, reorder, reordering, reorganization, reorganize,
   reprehend, reproach, reprobate, resort, resource, restructure,
   restructuring, revolution, riddance, rile, ripple, rock, roil,
   roughen, rouse, ruffle, rumple, sap, shake, shift, shock, smash,
   soften, soften up, solution, squash, stagger, step, step up, stir,
   stir up, stopgap, stratagem, stroke, stroke of policy, subdue,
   supple, swirl, tactic, temporary expedient, tenderize, tone down,
   trick, trouble, trump, tune down, turnover, unbrace, undermine,
   unman, unnerve, unsettle, unstrengthen, unstring, upset, wake,
   wake up, waken, weaken, whip, whip up, whisk, work up,
   working hypothesis, working proposition