When another person of any gender gets in the way of a woman's attempt to initiate sexual contact with another woman. This can be by distractions or their own sexual flirtations.
Dude, I was at the bar with Sheila and she totally started Beaver Damming me for that ginger chick in the corner! I won in the end though- who's the beaver dam now!!
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.