wanklage
A computer programming language that provokes more discussion of how it may be implemented, or how to overcome its built-in limitations, than of what useful programs can be written in it. An absorber of language wankage.
I think Haskell may have supplanted Lisp as the pre-eminent wanklage. I have come to appreciate the fog of wanklages for their power of keeping discussions of useful and potentially useful languages relatively free of wankage.