(UK, historical) Cheap seats in a theatre, costing one shilling and nine pence.

present participle of one-trick

simple past tense and past participle of one-trick

(informal) That's a funny joke (often said to indicate that what has just been said is laughably unbelievable.)

(US) used to emphasize that one is behaving or going to behave in a trustworthy manner. / (dated) expected to do what one has promised, expected to uphold one's promise.

making somebody feel guilty.

Alternative form of on one's P's.

Alternative form of on one's L's.

(now regional, dated, idiomatic, slang) Not a single one, none (of a number of people or things). / (now regional, dated, idiomatic, slang) Not; with a singular pronoun, negates the clause.

plural of one-holer