LOL, its from a show about river loggers. Like dudes who pull logs out of rivers. At first, I thought wtf is this, how many logs can people pull out of rivers. Apparently a lot because Swilly was an ace at it.
In my eyes "Swilly" is easily a top 10 nickname. Now for me, the problem with cool nicknames is most people already claim them. Take "Maverick" for example. That's a slick nickname, but it's Tom Cruise from that movie "Top Gun", or Mel Gibson from that movie literally called "Maverick".
To your credit, Johnny 5 is pretty good. The robot from "Short Circuit" had more style than both mavericks.