Poontangerang is poontang that you try to throw away, but it just keeps on coming back.
Rick: "Are you and Bethany still together?"
Steve: "You wouldn't think so. I haven't called her in like a week. I even slept with her sister, but that poontangerang keeps peepin' me up!"
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.