i need help trying to remove a stripped nut on the spoiler. what should i do

 

Is the head stripped or is it the threads? If you stripped the head, you could use an extractor bit or hammer on a smaller socket that you don't care about.

 

knock it out with a screw driver and hamma

 

cut it off?

 

You can buy whats called a nut splitter at most supply stores that will split it and spread it apart so that it can be removed.
Some times you can remove them by clamping a vise grip on the nut and pulling hard on it while turning and threading it off that way.