A. The state of having been subjected to the "expelliarmus" spell. (from the popular book series "Harry Potter")
B. To be in a complete state of disarray, disarmed of all mental prowess, having been subjected to an overwhelming defeat - or having undergone a rigorous or lengthy trial.
The act of pulling out, grabing your own penis at it’s base, waving it in a circular motion like a wand and yelling « EXPELLIARMUS » as you cum on your girlfriend’s face.