It's neither and all. As pg said, it's any esoteric language which is not strictly learned as part of standard commercial software development.

Has anyone coined the term 'language hipster' yet? Because now seems like a good time.

I don't think that many people learning those interesting-but-not-immediately-practical languages do it to appear cool (what I think is the defining characteristic of hipsters.)

Programming characteristics are quite different from fashion/lifestyle. It takes much more effort to learn a language than to choose an obscure band to listen to. And the payoff in perceived coolness is also much smaller - see for example http://steve-yegge.blogspot.com/2010/12/haskell-researchers-...

I agree. I play with new languages (I won't claim learning just yet) out of curiosity and as a very productive form of procrastination.

Lispter would be fitting, albeit a little difficult to say.

The .com is available.