[now and then] or [now and again] {adv. phr.} Not often; […]

[now or never] {adv. phr.} Exclusively at the present time. * […]

[now that] {conj.} Since; because; now. * /Now that dinner is […]

[nowhere] See: [OUT OF NOWHERE].

[nowhere near] See: [ANYTHING LIKE].

[NOYB] "None of your business"

[NP] "No problem"

[NPA] "Not paying attention"

[NPNT] "No picture, no talk" Origin from Hardwarezone

[NR] "No reserve"