charley horse

from WordNet (r) 3.0 (2006)

charley horse
    n 1: a muscular cramp (especially in the thigh or calf)
         following vigorous exercise [syn: {charley horse},
         {charley-horse}]

from Moby Thesaurus II by Grady Ward, 1.0

36 Moby Thesaurus words for "charley horse":
      acute pain, bite, boring pain, cramp, cramps, crick, darting pain,
      fulgurant pain, girdle pain, gnawing, griping, hitch, jumping pain,
      kink, lancinating pain, nip, pang, paroxysm, pinch, prick, seizure,
      sharp pain, shoot, shooting, shooting pain, spasm, stab,
      stabbing pain, stitch, thrill, throes, tormen, tweak, twinge,
      twitch, wrench