I fail to understand these two parts:

"In STFUDD ... you don't write anything at first. " "STFU Driven Development ... its How quickly can we Shut the Fuck Up and write something?"

So, which is it - don't write or write quickly?

I also fail to understand this part:

"we're all full of shit. And that's why you test. That's why you write a README."

How exactly "tests" and "README" connected to "we're all full of shit"?