Definition from Wiktionary, the free dictionary
- To correct minutiae or find fault in unimportant details; to kvetch.
- Someone will invariably nitpick about any spelling error posted to the forums.
- 2012 April 26, Tasha Robinson, “Film: Reviews: The Pirates! Band Of Misfits :”, The Onion AV Club:
- But Pirates! comes with all the usual Aardman strengths intact, particularly the sense that its characters and creators alike are too good-hearted and sweet to nitpick. The ambition is all in the craft rather than in the storytelling, but it’s hard to say no to the proficiency of that craft, or the mild good cheer behind it.
- (archaic) To pick nits - lice eggs - from someone’s hair.
- Watch the mother gorilla nitpick the baby’s fur clean.
Related terms 
See also 
to correct minutiae or find fault