小事一樁啦

你想和他保持良好關係的話，去敲他辦公室的門，然後關起門，一對一說“I know you use it as a friendly nickname, but I really don't appreciate being called 'Sneaky'. It makes me uncomfortable, and quite frankly, I find it offensive. It would be great if you could call me (John) , like everyone else does. Would that be OK with you? ” 然後借機下坡，誇他兩句，說說以後繼續合作愉快，男人對男人的握個手，等等，闡明了立場，也別讓他太尷尬。

我覺得你臉皮薄的話，寫email也行。