The practice of making a small fire under your vehicle (usually a diesel) letting the engine become warm enough to start in negative degree freezing weather. Usually done in preparation by driving the vehicle on a pile of snow or ramps so the flame doesn’t touch any metal or wires directly.
“Man it’s negative 20 today and we need to go into town to get more food and booze, how are we supposed to start our pickup?”
“Don’t worry, we make a Yukon Stove!”