Definition of hair-splitter in English:

hair-splitter

noun

  • See hair-splitting

    • ‘Human consciousness is too important to be left to the hair-splitters.’
    • ‘However, don't go endlessly back and forth between suppliers in an attempt to grind out a rock-bottom price, otherwise you'll be marked down as a time waster and a hair-splitter.’
    • ‘They are the most preposterous and unjustified of all the guesses which can be made about the universe, and I am not enough of a hair-splitter to pretend that I don't regard them as arrant and negligible moonshine.’