nitpicking
1. [ adjective ] quibbling over insignificant details
Synonyms: carping quibbling pettifogging caviling
Examples:

"caviling pettifoggers and quiggling pleaders"-Edmund Burke "her nagging and carping attack" "thought her editor unnecessarily nitpicking" "a pettifogging lawyer's mind" "had no patience with quibbling critics"

Related terms: critical
Similar spelling:   nitpick
  nitpicker