A worthless pile of cat shit. When spotted in its natural habitat, an asshole, it retreats back into the anus like a rodent. It has developed a symbiotic relationship with a dipshit. Unboltingsiren3 is a parasite that many find revolting and wish it would just look up AcidSupercobra on Urban Dictionary.
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.