Abbreviation of Sirach.

plural of dear sir

(archaic) excrement

(archaic) Used apologetically when something offensive is mentioned.

(dated) Used as the salutation at the beginning of a formal letter when addressing persons – assumed to be male – of unknown names.

(UK) A high-ranking bureaucrat, particularly one who is elitist and deliberately obscure.

plural of Sir Humphrey

plural of sir-reverence

(obsolete, colloquial) A priest.

plural of Sir John