>>39
Domain Specific Language.
(Fuck off, you
DON'T HELP HIM faggots.)
Also, if you just want to play around with designing a language and don't want it to look exactly like every other goddamn Lisp clone, take a look at Parrot. It's pretty easy to dump out PIR code. As for parsing, try Haskell (or Python with pyparsing, if haskell isn't your thing).
That should be more than enough to get you started; if you've any experience with lower level code (that is, if you've written a few things in assembler, or at the very least, lots and lots of stuff in C) you should be able to hammer away at some code and get a not-very-well-designed, but entirely functioning language, in less than 500 lines of code.
The best part about doing it this way is
it won't be just another stupid Lisp or Forth clone.