I remember the day when Hopkins gave me the nickname "tater tot" and then afterwards, my other villagers joined in and began to call me tater tot as well. I couldn't stop laughing when Hopkins gave me that nickname because I thought that it was the most hilarious nickname that my villager ever said to me.
I believe the only 2 nicknames I have right now are skippy (Chief + Roscoe) and maestro (Marshal). I had a few other villagers who gave me nicknames but they've all moved on from my island
Initially, Cobb (or someone) called me racer, but someone else came up with backbeat, which is now spreading to other animals. I think both nicknames are cool.
Erik called me wonder bud and its such a sweet and erik (lazy) nickname that I let the rest of my island call me that too. I think Ruby tried to change it to superstar which is cute but hello SHE's the superstar if only there was a way of saying that, instead of just flat out No (her sad face ahh)