SIDESPLITTING Meaning of SIDESPLITTING in English sidesplitting BrE AmE ˈsaɪd ˌsplɪt ɪŋ AmE \ -ˌsplɪt̬ ɪŋ▷ sidesplitting|ly li Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012