noun. A doggedness possessed by only the most batshit-propelled pooches--the kind who, as we speak, are chewing your slippers and contemplating your best Sunday dress as an appetizer.
Related term: God-mentum.
Real citation: "because of this (and his completely obnoxious pent up energy), i have started letting him out earlier on the weekends, in hopes to give him a bit more time to get rid of that which could power the entire globe for the next 30 million years, sufficiently ending the energy crisis. that which i call his dog-mentum, the insane amount of pure unfiltered energy. that which makes me wish there were more things on him to get neutered off, because ISN'T THAT SUPPOSED TO SOLVE THIS RIDICULOUSNESS?"
(Jennifer Caitlin, July 28, 2008, http://jennifercaitlin.blogspot.com/2008/07/mothers-love-stretched-thin.html)
Made-up citation: "I know something about dog-mentum: My rat terrier is the fastest dog in the park, and his nickname is Crack Baby. He burns with the energy of a thousand nuns, like the kids say. If we could wire him up and tap his bottomless reserves, the price of gas would plummet, nuclear fusion would be unnecessary, and we'd both take more naps."