hard r

noun2

1. •
   (US) The hard r at the end of the word nigger when spoken with a General American accent and considered more offensive than the African-American Vernacular English pronunciation conventionally spelled nigga, whose final sound is sometimes called soft a.

   • First and foremost / You are under no circumstances / Ever permitted / To say the n-word / I don't care if it's soft a or hard r — 2016
2. •
   (informal) A rhotic sound which is emphatic or strongly enunciated; in English accents especially a postvocalic consonantal r, as distinguished from its absence in a nonrhotic accent or from an R-coloured vowel.

   • Her English accent was still noticeable, though hard r's surfaced in it from time to time. — 1978