A response to let someone know they should stop commenting on the fact that you are expressing what they consider to be negative vibes, thoughts, feelings etc.
"I'm pretty sure that I didn't get the manager's position that's opening up in my department."
Friend: "You have to be positive... don't be sending negative waves out there."
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.