To Hardoga means to enjoy urself. It originates from the japanesecelebrity Hard Gay, who seems to enjoy himself whilst performing public stunts. He pronounces his name as "HARD-O-GAY", and since this takes up 8 characters, it cannot fit into an msn emoticon, so the word hardoga is used instead.
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.