split hairs

noun
  1. 1

    Tedious details; minutiae.

verb
  1. 1

    To consider or argue about fine details; to worry about minutiae.

    โ€œLet's get everything sorted into the right drawers and not split hairs about subdividing it further yet.โ€

    syn:cavil

Synonyms

Source: https://en.wiktionary.org/wiki/split%20hairs