also diss, slang, by 1980, shortening of disrespect or dismiss, originally in African-American vernacular, popularized by hip hop. Related: Dissed; dissing. Earlier it was short for distribute in late 19c. printers' slang and for disconnected in the telephone-line sense, and in this sense it was given a slang figurative extension as "weak in the head" (1925).
updated on August 23, 2018