Definition of sidesplitting adjective from the Oxford Advanced American Dictionary

 

sidesplitting

 adjective
adjective
NAmE//ˈsaɪdˌsplɪt̮ɪŋ//
 
(informal)
 
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extremely funny; making people laugh a lot sidesplitting anecdotes
sidesplittingly
 
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adverb side-splittingly funny