The Shittiest Language I Ever Used
foreverscape.com
foreverscape.com
Of course, I can build and run the code locally before checking in.
I had a friend who around 1996/7 hacked together some shell scripts where he could send an email to himself and it would get automatically posted to his 'weblog'. It was very cool and he used it like people use twitter/facebook today.
They also had a similar thing where you would upload Flash files (FLAs) and various assets like fonts, and it then compiled it all into a SWF. Again, with no useful output. Getting that to work was mostly just praying and swearing - I'm pretty sure it was non-deterministic. I think that was the closest to tears I've ever been whilst writing software.
The first project I did for them, I allowed two weeks for the build and one day to compile the assets with their system (because I hadn't been told it involved web interfaces and no error handling). The second time, I allowed two weeks for the build and two weeks to compile it.
My personal nomination for the shittiest language I ever used is MUMPS.