If atheist pride themselves on their intellect what happens to atheist that are really stupid?

They pretend to know more than they do, and try to act intelligent

The same thing that happens to really smart ones -- nothing out of the ordinary.

You seem to have mistakenly thought we have some kind of atheist heaven or hell.

That's silly -- we don't.

Your initial assumption ("if atheists pride themselves on their intellect") is flawed, the rest of the question is invalid.

Atheists don't pride themselves on their intellect. We simply don't believe in Gods or Goddesses.

Same things that happen to Christians that are really stupid...

True stupidity is an equal opportunity employer...

IMHO

I often wondered why ALL Christians are inteligent, so is that an intellectual or stupid question?

atheists, not atheist. There's more than one of us. Is pluralization all that difficult for you?

They get bad grades in school, and end up with bad jobs.

Yeah, I agree with Asdzani, they convert to church or whatever.

How would a fundie ever know or tell.