Noun and possible Adjective
1. A phenomenon where older ladies (late 30s+) start having a bigger, flatter ass that seems to grow half way up their back, and partially down their leg.
Example: Woah! Check out the serious case of Dutch Butt on that blonde! It’s like her ass is consuming her back!
Origin: cloudy, but sources can be linked to Brian H. and his Brother-in-law Derek L. of Grand Rapids, Michigan (where a high concentration of Dutch descendent ladies happen to have big, tall, pancake asses.