get (one's) oats
slang To have sex, especially frequently. Primarily heard in UK. Bill is hardly ever home anymore—he must be getting his oats now that he's single again.
get your oats
have sexual intercourse. informal 1965 William Dick A Bunch of Ratbags I was kissing her excitedly and passionately… Cookie, you're gonna get your oats tonight for sure, I thought to myself.
get your ˈoats
(British English, informal) have sex regularly