postman's knock

noun — 2 senses

postman's knock

noun

1

A double knock at the door to indicate the delivery of letters or telegrams.

Whilst he was speaking we were startled by a knock at the hall door, the double postman's knock of the telegraph boy.1897, Bram Stoker, Dracula, Westminster [London]: Archibald Constable and Company, […], →OCLC:

2

Synonym of post office (“a party game involving the exchange of kisses”).

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.