Exploiting a popular franchise, usually film or television, and adding so many new installments that relevance wanes and audiences lose interest
The original Land Before Time was awesome, but now they have so many sequels, it seems they are milking a dead cow, and they just get worse and worse."
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.