1) The act of masturbating while eating. 2) Becoming sexually aroused to the point of self-stimulation from the taste of food.
Dieting and sexual frustration can lead one to eaturbate. My girlfriend was eating sandwiches in bed with the door locked, so I knew she was eaturbating. see Kirstie Alley
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.