if I pretend to be stupid can I get out of jury duty?

Nope. That is the Exact kind of person wanted for jury duty. 

I doubt it.....

Tell them you don't know how to read and write because you never went to school, but you can read the strock returns.

You may get out of it this time, but you'll be called up again.  And the courts can tell if someone is just trying to wiggle their way out of doing their civic duty and if so, you'll find yourself called up more often.

No. You have to pretend to be smart to get out of jury duty. 

 Just have very strong opinions about the case.

just mention jury nullification 

You dont need to pretend

That's funny. Do you really need to pretend?

Just tell them you know the defendant if you really wanna get out