The Excalibur is when you plunge your phallic sword into the butt of an unsuspecting damsel. In surprise, she clentches her quivering ass cheeks together, clamping your meat saber in the dark recesses of her "dragon's lair." Now, you must choose your destiny by pulling your sausage machete out of her butt jungle. If you can accomplish such a feat, you will become the king you were born to be. And then hoagie slap her with your shit-covered dick.
"Hey, Wanda, why are you sitting on a hemorrohid donut?"
"Because some gas station attentant performed the Excalibur on me in the women's restroom and became a king. Heavy lies the crown, and heavy lies my rectum, which is dripping out of my anus."
"Hey, Carla, can you pick my sphincter up? It fell on the floor after a hobo did the Excalibur to me last night."