When a guy blows his load early on a girl's panties before he even gets the panties off, thereby wetting her panties on the outside...similar to the torture form of waterboarding.
Jeff blew his load too soon and totally waterboarded that girl's pussy! His wife told me is a master at Waterboarding a Vagina!
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.