A verb, which means to place ones hooked finger or fingers between another's butt cheeks with an intent to startle, although it is often done in a joking, playful manner between friends. This procedure is normally done while the "receiver" is wearing clothes, although there is no reason why it couldn't be done without clothes.
A mind blowing, fully mental, rip the arse out of it Bachelor party; one where generations of jocks and frat boys would idolise the groom for the crazy shit he endured.
Oftentimes, there is a Japanese film crew in tow to ensure the bachelor becomes more famous in Japan than Bill Murray. Whisky sponsorships will follow.
The Hook, or as its know in laymens terms Bendycockolitus, It's basically where your penis doesn't get hard on one side, left or right, it doesn't matter, and basically it bends to one side, thus creating a hook shape.