A word developed in a town called Doncaster in Northern England meaning "big".
Originates from the word "chost" meaning marijuana.
e.g. "We need to score some chost".
"Make a chosty biff"
"That's the chostiest girl I've ever seen"
"...Then this chosty bouncer walked up and booted me out of the club"
(noun) The area on a female that is between the lower part of the vagina and the anus. It's a combination of the hoochi coochi la la and the booty area. This area is known as the "taint" on a male body.
While shaving my cooty booty in the shower this morning, my legs were in such a weird position that I felt like I was stretching for an Olympic gymnastics routine.