The phrase "afternoon off" refers to a period of time during the afternoon when an individual is allowed to take a break from their work or other responsibilities and engage in leisure activities. Full definition
It was an unusual campaign trip, and not just because the candidate was doing the driving and taking afternoons off to hang out with his daughters. (nytimes.com)
So many people entering the work force think that a salary, vacation days, and afternoons off when they don't feel like working are guaranteed. (inc.com)
When I finally decided to sit down and make scones, I took the entire afternoon off to make sure I had plenty of time. (zagleft.com)