haha Extruded Dingus comes from a line in a movie called The Hudsucker Proxy.

It's a Cohen brothers movie and the main character invents the Huila Hoop.. which he calls an "Extruded Plastic Dingus" at one point.. lol

I thought it was the perfect nickname for a Maya message board. haha

There are a lot of meanings for Dingus though..

https://www.urbandictionary.com/define.php?term=dingus

It's funny though because I have heard this word used a couple times on Letterman in the past couple days too. My username on Youtube has been ExternalDingus for a long time as well.