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Longman Dictionary of Contemporary English
nit-picking
noun
EXAMPLES FROM OTHER ENTRIES
▪ I've had enough of your constant nit-picking. Why can't you say something encouraging?
EXAMPLES FROM CORPUS
▪ And finally, the bottom line, is the budget approved without long delay and nit-picking?
▪ Most businesses, especially small businesses, can not afford to squander vast sums of money on such refined legalistic nit-picking.
Wiktionary
nit-picking

n. (alternative spelling of nitpicking English)

Usage examples of "nit-picking".

Technically speaking, nit-picking should really be called eggshell-picking, since by the time many nits are discovered the lice have left the egg.

According to the carefully kept and minutely analysed rec ords of the galaxy’s more nit-picking elder civilisations, the Chelgrians had persisted in their religiosity for a significant time after the advent of scientific methodology, and - in continuing to cleave to the caste system - were unusual in retaining such a manifestly discriminatory social order so long into post-contact history.

I hate kids, she had retorted, I had Julia by immaculate conception, and I resent any comparison to that obnoxious nit-picking bitch!

According to the carefully kept and minutely analysed records of the galaxy's more nit-picking elder civilisations, the Chelgrians had persisted in their religiosity for a significant time after the advent of scientific methodology, and - in continuing to cleave to the caste system - were unusual in retaining such a manifestly discriminatory social order so long into post-contact history.

Nangi, Ikusa and Ken Oroshi chatted informally like the best of friends while the lawyers pored over their arcane wordings, nit-picking each other to death.

Nangi, Ikusa and Ken Oroshi chatted informally like the best of friends while the law­yers pored over their arcane wordings, nit-picking each other to death.