WordNet (r) 3.0 (2006):

shake off
    v 1: get rid of; "I couldn't shake the car that was following
         me" [syn: shake, shake off, throw off, escape from]
    2: get rid of; "he shed his image as a pushy boss"; "shed your
       clothes" [syn: shed, cast, cast off, shake off,
       throw, throw off, throw away, drop]

Moby Thesaurus II by Grady Ward, 1.0:

32 Moby Thesaurus words for "shake off":
   beg, cast off, circumvent, clear, dispel, ditch, do away with,
   double, eliminate, elude, escape, evade, exterminate, fling off,
   get around, get away from, get clear of, get free of, get out of,
   get quit of, get rid of, liquidate, lose, purge, rid, shake, shoo,
   shuffle out of, skirt, throw away, throw off, unburden