the term used to describe a dumb or slow person either self inflicted or not, generally a person who has and or does smoke too much marijuana on a regular basis.
stoned gentleman on a beenbag mindlessly playing playstation one........ You walk in and say "you sir are a drophead" and leave
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.