When a person puts their mouth on a glory hole in a public restroom, bar, or other venue and is expecting to be absolutely throat blasted by a fat juicy hog but instead ends up open mouth kissing a person named Matt on the other side.
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.