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"
She is a wonderful and beautiful girl who will make your day the best. She loves to laugh. If she is you friend/Bestfriend then you are lucky to have her. She is also sweet .