Similar to other hybridwords, Astalavagina is a combination of Astalavista and Vagina. Used primarily by those who prefer a sophmoric sense of humor and/or like saying vagina. It's used in place of goodbye or go fuck yourself.
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.