Lisp

Computer Programming language. Short for "list processor".

Championed in particular these days by Paul Graham.

The core language in the MIT CS department, I believe.

The core language (historically) of Artificial Intelligence.

Steve Yegge on its problems.

http://reprog.wordpress.com/2010/04/14/the-long-overdue-serious-attempt-at-lisp-part-2-is-lisp-just-too-hard/