n. 1 the egg or young form of a louse or other parasitic insect esp. of human head-lice or body-lice. 2 Brit. sl. a stupid person. nit-pick colloq. indulge in nit-picking. nit-picker colloq. a person who nit-picks. nit-picking n. & adj. colloq. fault-finding in a petty manner.
[ OE hnitu f. WG ]