An unspoken, unwritten law, whereas one man will not expose another man's attempt to get action on the side . Ironically, one of the only ways to find out about said law, is to break it.
"Hey man that was fucked up telling Christine about Josh's fling. That's breaking Man's Law bro."
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.