It's the maximum possible way to express the greatest human body part, some people like to lick it, other like to play with it and so on, but finally it's designed for shatting
Noun: When a person, specifically an old, crusty gym dude, casually walks around nude in the locker room and decides to bend over in front of you, exposing his asshole.
Friend: Yo, what the fuck? Did you see that?!
Me: Yea bro, he just gave you the fullhole!