The act of urinating on your spouse, or significant other, without their knowledge or consent. Best performed in the early morning hours while they are still asleep.
Mike: "Hey, did you get your girlfriend up early this morning?"
Jim: "Oh yeah, I gave her the old "morning Justin". Shot out of bed like a rocket. Works every time!"
Mike: "You pissed on your woman while she was sleeping? That's disgusting!"
Jim: "Yeah, everyone's telling me that lately."