"Spek" - found on the continent. As pure bacon fat with no meat on it, it's often served up as part of a fried breakfast. Other uses are... http://en.wikibooks.org/wiki/Cookbook:Spek
in terms of diet, I think you are supposed to avoid anything that is more than 30% fat, or if something is 30% fat or more then it is classed as high in fat.