subs. phr. (common).Trousers: see KICKS.
1850. F. E. SMEDLEY, Frank Fairlegh, 25. I put a piece of cobblers wax on the seat of Mildmans chair, and ruined his best Sunday-going SIT-UPONS.
1853. REV. E. BRADLEY (Cuthbert Bede), The Adventures of Mr. Verdant Green, an Oxford Freshman, II. x. I should advise you, old fellow, to get your SIT-UPONS seated with wash-leather.