Uddering is a sexual position/act involving 2 partners. It occurs when a male is naked on all fours and the other partner masterbates him into a bucket which is directly under him. The partner then drinks the ejaculation from the bucket.
Friend: So what did you and John get up to last night?
Girl: Oh we tried Uddering. It didn't taste very nice...
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.