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English definition of “charley horse”

charley horse

noun [C]     /ˈtʃɑː.liˌhɔːs/ US  /ˈtʃɑːr.liˌhɔːrs/ (plural charley horses) US informal
a cramp (= a sudden painful tightening of a muscle) in your arm or legDisorders of muscles and the nervous system
(Definition of charley horse noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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