Leo, I think you are on the wrong track this time. In my opinion "cool" 
is a generic concept and it doesn't refer to any particular culture or 
subculture. See definitions in

"7. (informal) In fashion, part of or fitting the in crowd; originally 
hipster slang."

Note the reference to the "in crowd". Who are the "in crowd"? Naturally 
there are lots of them, there's a different "in crowd" for every 
subculture. Therefore the definition of "cool" is highly variable. 
Cultural revolution militants, Soviet pioneer groups, Islamic youth 
organizations and Esperantists, all of them have an "in crowd", so all 
of them have a distinct definition of "cool".

So "mojosa" doesn't point to the American culture. It's a 
context-specific word.

"Esperantujo estas mojosega loko, plena je mojosegaj samideanoj"

In cxi tia kunteksto "mojoseco" estas junula *esperanta* afero.


Leo Moser wrote 2014-08-29 09:12:
> While Zamenhof never heard of it, 'mojosa' is a neo-Esperanto word
> coined from the words moderna-juna-stilo (modern youth style). It was
> specifically coined to equate to the colloquial English usage of the
> word 'cool.'  Originally, I think, by a music group.
> But what IS the 'modern youth style?' Something Esperantist?
> No, hardly!
> The 'cool' modern youth style of today is something that was created
> via the world of jazz ( + the flappers and suffragettes), early radio,
> Hollywood, related TV, MTV, the Beetles and 1000 music groups during
> the 20th century, the Internet, etc. etc.
> The 'concept of being cool' was not created by the Mao's "Cultural
> Revolution," nor by Soviet "Pioneer Groups," nor by Islamic youth
> organizations, nor by Esperantists, etc. It was 95% the result of
> mass-media centered in the English language (including Afro-American,
> Caribbean, etc. components.) Jeans, T-shirts, many other things were
> also 'cool' and the life styles evolve. James Dean, James Bond, Elvis,
> Madonna.
> It is the mass-media, largely that in English, that tends to define
> what is 'cool' today.
> Esperanto never became 'cool' - it probably would be considered
> downright 'nerdish' or 'uncool' by most youth if they heard of it.
> Having coined a word for 'cool' does not make Esperanto 'cool.'
> I don't mean to sound unkind or cynical. This is only being realistic.
> Best regards to all,          LEO
>   Leo Moser