From Longman Dictionary of Contemporary Englishput your feet upput your feet upinformalREST to relax, especially by sitting with your feet supported on something → foot
Examples from the Corpus
put your feet up• Take off your coat and put your feet up.• E for elevation, otherwise known as putting your feet up.• Then he put his feet up on the bench and snored for ten minutes.• He pushed the ottoman over and I put my feet up.• Well, at least put your feet up for a few minutes. Would you like a drink?• Tammuz had dimmed the lights, put his feet up, and asked the computer to tune in the wall-screen.• That boy needs a lot of teaching, he thought, putting his feet up.• When you're pregnant and doing a full-time job, you must find time to put your feet up.• He says it gave him time to put his feet up and relax. 