[muster] See: [PASS MUSTER].

[my God] or [my goodness] {interj.} Used to express surprise, shock, […]

[my lips are sealed] {informal sentence} A promise that one will […]

[MYOB] "Mind your own business"

[N/A] "Not applicable" or "not available"

[n0083127z] "Nooberts" a mutation of n00b, often used to describe someone […]

[N1] "Nice one"

[naff] {adj.} Inferior or in poor taste. Also used as sentence […]

[nail] See: [HARD AS NAILS], [HIT THE NAIL ON THE HEAD], […]

[nail down] {v. phr.}, {informal} To make certain; make sure; settle. […]