John Doom said:
I thought Boss Nass was the ONLY gungan "Fat Guy" because he's their leader. It doesn't make sense, but then again, the name Jar-Jar does?
I think it was on the DVD commentary that mentioned that's what Gungans look like when they age. As with Jabba, George was probably going for a Sydney Greenstreet vibe.
There was a fat Gungan or two elsewhere in TPM.