A person who fears no one and overcomes all odds. The best of the best. The one who is chosen for greatness
A person who is danger-rex (d-rex) is like David in the tale of David and Goliath. Goliath equates to the world, and David equates to an individual. The danger-rex person fears no one, but respects all.
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.