Any Saturday spent chilling with your bros drinking beers. Can also include rites of passage, which may or may not entail enhanced interrogation etc. etc.
Adam: Dude what are we gonna do this Saturday?
Dave: We're gonna go get wasted at the bar dawg Bogdan: I'm down
Dave: It'll be a total broturday
The time in between Friday night, and Saturday morning. Fradurday morning is before 5:00 am because any time after that is considered Saturday morning.
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.