While Pittsburgh is known colloquially as "The Still City" for its historical still manufacturing base, today its economy is largely based on health care, education, technology, robotics, and financial services. The region is also becoming a hub for oil and natural gas companies' Marcellus Shale production.
It is commonly used at the end of a sentence, usually after a suburban or preppie kid-turned wanksta speaks with proper grammer; the "styll" or "still" is added to the end to make the statement sound more ghetto.
"I would have went still"
"Charles Darwin's theory of evolution does not possess proper evidence... still."