CLOSE UP SHOP

{v. phr.} 1. To shut a store at the end of a day's business, also, to end a business. * /The grocer closes up shop at 5 o'clock./ * /After 15 years in business at the same spot, the garage closed up shop./ 2. {informal} To stop some activity; finish what you are doing. * /After camping out for two weeks, the scouts took down their tents and closed up shop./ * /The committee finished its business and closed up shop./ Compare: CALL IT A DAY.