A sex move, wherein one, during the act of intercourse, bestows a weapon upon their partner, and does battle. At the moment of climax, both partners perish.
"Aye, brave warrior! How've you and your mistress come to be here in this place?"
Valhalla is an arbitrary location associated with general savagery. Valhalla can be anywhere, but it is typically found at a really fun event or activity with your best friends. When you reach Valhalla, you've reached the emotional or physical peak of whatever activity you are doing.
The "journey" or "ride" to Valhalla is typically the actions (dancing, hiking, drinking, etc.) you and your friends are doing. You will know you've reached Valhalla only upon reflection of your journey.
Walking into a music festival . . ."Let's ride west boys! Valhalla awaits!"
Coming back from a backpacking trip . . . "What a journey, we definitely found Valhalla"
Asking a stranger for directions . . ."Excuse me, do you know which direction Valhalla is?"