Trying to see if you still got it. After you have passed your prime, trying to continue just to see if you can. Coine by Andre 3000 in the song Da Art of Storytelling Part 4.
Attributed to arguably one of the best quarterbacks to ever play in the NFL yet can never decide when to hang them up, Brett Favreing it simply means to wear out your welcome.
Example: " Chris has drank the rest of our beer and is now eating our food, that dude is completely brett favreing it (or being a brett favre)."