When an under-aged girl performs a BJ leaving her lips all crusty like an unwanted donut that when you see them you puke and die a little on the inside!!!
YO man, I just saw some skank with a fresh pair of crusty lips!!!
a man who is described to be crusty with abnormally over larged butt lips. micropenis and gap teeth and choc-o-lat are normally side effects of the crusty butt lips syndrome.
john: dude, get some chap stick for your crusty butt lips.
A trip to a grocery store, convenience store, or gas station for the sole purpose of buying an excessive amount of junk food and sugary drinks, usually with friends. A chud run often happens late at night and ends with everyone involved hating themselves afterwards.