English

Noun

idiot savant ‎(plural idiots savants)

1. A person who exhibits an extraordinary ability in one subject (often mathematics) whilst being mentally retarded in all other fields.
   • 2014 May 11, Ivan Hewett, “Piano Man: a Life of John Ogdon by Charles Beauclerk, review: A new biography of the great British pianist whose own genius destroyed him [print version: A colossus off-key, 10 May 2014, p. R27]”, in The Daily Telegraph (Review):

     The temptation is to regard him [John Ogdon] as an idiot savant, a big talent bottled inside a recalcitrant body and accompanied by a personality that seems not just unremarkable, but almost entirely blank.

Synonyms

• autistic savant