What a horny stud claims to be when asking a chick to let him "do it bareback" with her.
No normal dude is 100% thrustworthy --- he mayTHINKdat he can control whether or not he ejaculates, but it is still an involuntary thing, and if he gets excited enough, all bets are off!
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.