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Use "sidesplittingly" in a sentence
"How sidesplittingly funny and original you all are!"
"I can't get enough of the sidesplittingly funny and charming Charlaine Harris and Margaret Maron - I really could follow them around to just to hear them talk."
"I don't read much in the way of comedy writers, but Harley Jane Kozak (DATING IS MURDER) is sidesplittingly funny."