In Infinity War, Rocket calls the rest of the Guardians morons and later Thor is all, *earnestly* “Farewell and good luck, morons!” like he doesn’t know it’s an insult and guys, he lived on Earth with Tony Stark for two years. He knows what a moron is. That fluffy ball of sunshine just felt like being a little shit. And I now headcanon that Thor probably does this kind of thing a lot bc he gets a kick out of it.