Overdriven

Term used to describe a joke that has been killed, or done to death, as in not funny anymore because it is older than the internet.
This came about from the Toronto Prelude Club web board forums, where a user by the alias "Overdrive" consistently posts jokes that are so tired, the baby boomers were using them when they were kids.

Maaaaan, that joke is so Overdriven.

or in the context of forum use;

this thread is Overdriven.