[night owl] {n. phr.} One who sleeps during the day and […]

[nightcap] {n.} A good-night drink; a drink taken just before bedtime. […]

[nine] See: [CAT HAS NINE LIVES], [ON CLOUD NINE].

[nine-to-five job] {n. phr.} A typical office job that starts at […]

[ninety] See: [GAY NINETIES].

[nip and tuck] {adj. or adv.}, {informal} Evenly matched; hard fought […]

[nip in the bud] {v. phr.} To check at the outset; […]

[NM or N/M] "Never mind" or "not/nothing much". Also "no message", […]

[NM U] "Nothing much, you?" (generally said after sup)

[NMFYS] Unknown acronym from comic Badly Drawn Kitties, a webcomic. User-created […]