The art of pouring a beverage (of your preference) into a shoe (or any other foot-wear that you may be wearing), and drinking it out of the chosen foot-wear. People who are not cool "wouldn't do shoosies". These people are often then chastised and given a bad reputation due to their lack of balls.
Hey you're a wanker! You wouldn't do a shoosie.
Give me that! I'll show you.
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.