Slapping your big, fat, hairy, sweaty sack against someones ears or nose. Sometimes a nut might get lodged in someones ear or nose...making them sneeze or pop their ears. You may also choose to nut in the persons hair while having your nuts stuck in one of their facial crevices.
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.