A sex move where you use that silver spray paint from Mad Max on your dick then run and jump at the pussy/ass hole so precisely that it slides right in as you scream "To Valhalla!!!"
If your dick misses its target, you are honor-bound to bottom.
Noun.
When a hot shell casing from a firearm burns your skin and leaves a visible mark. Also known as a Valkyrie Kiss, kiss of a Valkyrie, or a Gun Hickey.