when going through a sexual act (usually oral) and finding somethingdisgusting, but having to continue what you were doing because you feel morally obligated to.
me: i remembered when i opened a bottle of fish sauce, it smelled exactly like my ex when i went down on her.
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.