Here's what they are, literally, dutchy:
http://en.wikipedia.org/wiki/Dutch_oven
A Dutch oven is a thick-walled metal (usually cast iron) cooking pot with a tight-fitting lid. A camping, cowboy, or chuck wagon Dutch oven has three legs, a wire bale handle, and a flat, rimmed lid so that coals from the cooking fire can be placed on top as well as below. This provides more uniform internal heat and lets the inside act as an oven. These ovens are typically made of bare cast iron, although some are aluminum.
And here's what jackb means:
http://www.urbandictionary.com/define.p ... dutch+oven
dutch oven
Blowing hard ass wind under the covers several times and building up stench while your old lady is brushing her teeth and getting ready for bed, then when she gets into bed, pull the covers over her head and yell \"Dutch Oven\" and let her enjoy the stench of your ass gas for at least 30 seconds.