"Storming the Castle" is a sexual act in which the female fills her vaginal cavity with hot oil, the male rolls around first in egg yolks, then in bread crumbs, and then the male proceeds to insert his erect penis into the vagina, effectively deep frying his phallus.
Variations include "Storming the Palace," popular among aficionados of the anal variety, and "Storming One's Own Castle/Palace," growing in popularity among contortionists and cat people.
My cat, Meatball, likes watching me storming the castle by myself at night.
putting the moves on a girl, seducing a lady friend in hope of getting some.
I was storming the castle last night with Jen.
Bursting through the door and taking a picture when a friend is hooking up with a questionable member of the opposite sex.
You should have seen the look on Kyle's face when we were Storming the Castle while he was hooking up with that fat chick.