The Collaborative International Dictionary of English v.0.48:

Tester \Tes"ter\, n. [For testern, teston, fr. F. teston, fr.
   OF. teste the head, the head of the king being impressed upon
   the coin. See Tester a covering, and cf. Testone,
   Testoon.]
   An old French silver coin, originally of the value of about
   eighteen pence, subsequently reduced to ninepence, and later
   to sixpence, sterling. Hence, in modern English slang, a
   sixpence; -- often contracted to tizzy. Called also
   teston. --Shak.
   [1913 Webster]

WordNet (r) 3.0 (2006):

tizzy
    n 1: an excited state of agitation; "he was in a dither"; "there
         was a terrible flap about the theft" [syn: dither,
         pother, fuss, tizzy, flap]

Moby Thesaurus II by Grady Ward, 1.0:

55 Moby Thesaurus words for "tizzy":
   befuddlement, bewilderment, bother, botheration, chaos, cloud,
   confusion, daze, discombobulation, discomfiture, discomposure,
   disconcertion, disorder, disorganization, disorientation,
   disturbance, dither, embarrassment, flap, flummox, flurry, fluster,
   flusteration, flustration, flutter, fog, foofaraw, frenzy, fret,
   fuddle, fuddlement, fume, fuss, haze, jumble, lather, maze, mess,
   mist, muddle, muddlement, opposite, perplexity, perturbation,
   pother, pucker, ruffle, shuffle, stew, sweat, swivet, twitter,
   twitteration, unsettlement, upset