The act of violently dispatching someone preemptively during a pandemic crisis, typically by a gunshot to the head, especially an apocalyptic zombie invasion scenario.
"If there is any possibility you might lie about bring bitten by a zombie, I'll straight dirty Tyrone your ass."
"What happened to Ryry?"
"That bitch was a liability and has been dirty tyroned."
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.