persnickety
From Longman Dictionary of Contemporary Englishpersnicketyper‧snick‧e‧ty /pəˈsnɪkəti $ pər-/ adjective American English CHOOSEworrying too much about details that are not important – used to show disapprovalExamples from the Corpuspersnickety• persnickety rulesOrigin persnickety (1900-2000) pernickety “persnickety” ((19-21 centuries)), perhaps from particular