fucking oats Share definition Flag Kiwi slang, a distortion of fucking oath. An extremely positive affirmation of agreement or awe. Person 1: "Man that's a tough sparrow!" Person 2: "Fucking oats!" or "Oats, bro!" fucking oats by fhgwgadsbbq March 3, 2011 0 0 Get merch Get the fucking oats mug. Buy Now — $32.95 See more merch