plum in one's mouth

== English == === Noun === plum in one's mouth An accent resembling Received Pronunciation (often described as plummy). Used other than figuratively or idiomatically: see plum,‎ in,‎ mouth. === Further reading === “a plum in your mouth”, in Cambridge English Dictionary, Cambridge, Cambridgeshire: Cambridge University Press, 1999–present. “a plum in your mouth”, in Collins English Dictionary, 2011–present.