قَىْءٌ

originally a verbal noun: then applied to signify Vomit; i. e. vomited food. (Msb.) It is said in a tradition, الرَّاجِعُ فِى هِبَتِهِ كَالرَّاجِعِ فِى قَيْيءِهِ [He who takes back his gift is like him who swallows back his vomit]. (S.)