This is Internet for: You what, mate? This is universally used by internet speakers, regardless of weather or not they live in a society where the term "mate" is commonly used.
This is the word "what," except it is pronounced and written with more awe; said when somebody says something what is too shocking for the word "what" to be used
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.