When you get drunk, hight, or start tripping because something is so bad in your life you want to escape.
Mark: What did you do last night?
Me: I was still so hurt that Megan dumped me, that I got some serious numbnation in.
Mark: Hey, that helps ease the pain a little.
Sensation Of Euphoria
When Jimmy Sticks His Finger So Far Up Hieu's Butt he feels this Sensation "Numbnation"