Freebagging is when you are playing Halo and someone kills an opponent and Teabags the dead body and you join in. You didn't make the kill but you join in the Teabag anyway. Freebagging!
My friend just go a dirty Halo sniper shot and was tea bagging the dead body and went in for a freebagging session.
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.