I'd start teasing back with my husband every time he did it if it bothered me. It's a convenient name to switch up to make fun of HIM. Every time he does it, you should say "U So stupid" or "u so childish" or "u so about to get punched"...lol.
That said, I'm the goober that started calling Sheldon "Poopers" and "Shelly Pooper".
