The Collaborative International Dictionary of English v.0.48:

Jimmy \Jim"my\, n.; pl. Jimmies. [Cf. Jemmy.]
   A short crowbar used by burglars in breaking open doors.
   [Written also jemmy.]
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

jimmy \jim"my\, n.; pl. jimmies. [Rhyming slang: Jimmy Grant,
   for immigrant. --RHUD]
   An immigrant. [Australian slang]
   [PJC]

The Collaborative International Dictionary of English v.0.48:

jimmy \jim"my\, v. t. [imp. & p. p. jimmied; p. pr. & vb. n.
   jimmying.]
   To pry open (a door, window, etc.) with a jimmy or similar
   device; often used with open; as, the burglar jimmied open
   the back door and stole the TV set.
   [PJC]

WordNet (r) 3.0 (2006):

jimmy
    n 1: a short crowbar; "in Britain they call a jimmy and jemmy"
         [syn: jimmy, jemmy]
    v 1: to move or force, especially in an effort to get something
         open; "The burglar jimmied the lock": "Raccoons managed to
         pry the lid off the garbage pail" [syn: pry, prise,
         prize, lever, jimmy]

Moby Thesaurus II by Grady Ward, 1.0:

26 Moby Thesaurus words for "jimmy":
   bar, beam, boom, cant hook, claw bar, crank, crow, crowbar,
   get a foothold, get leverage, handspike, iron crow, lever, limb,
   marlinespike, outrigger, peavey, pedal, pinch bar, prize, pry,
   ripping bar, spar, treadle, wedge, wrecking bar