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Adjective: persnickety  pu(r)'sni-ki-tee
  1. (used colloquially) overly conceited or arrogant
    "they're snobs--stuck-up and uppity and persnickety";
    - bigheaded, snooty [informal], snot-nosed [informal], snotty [informal], stuck-up [informal], too big for one's breeches [informal], uppish [informal], snobbish
  2. Characterized by excessive precision and attention to trivial details
    "a persnickety school teacher";
    - pernickety

See also: fastidious, proud, toffee-nosed [Brit, informal]