I recently heard someone comment that they "wish people would stop whinging about their first world lives".
It's an interesting concept a first- world life.
Wikipedia says Terms similar to developed country include "advanced country", "industrialized country", "'more developed country" (MDC), "more economically developed country" (MEDC), "Global North country", "first world country", and "post-industrial country".
Australia ranks 2nd only behind Norway as the most "highly developed" country as at 2 November 2011 according to the IMF.
To take the statement on face value alone, it implies that everyone living in a developed country, such as most of Europe, Northern America, Australia, New Zealand, Japan, South Korea etc etc have nothing in their life that is justifiably "bad enough" to feel anything but happiness.
There's such a wide spectrum of things you could look at here though: from the twink who is too drunk to reapply his eyeliner nicely and states "FML" in the bathroom at a party, to residents in the North of Japan who have not only lost their homes, jobs and possibly family members in the recent Tsunami to having residual worries about radiation from the Fukushima Nuclear plant potentially affecting their and their children's lives for the perceivable future.
Both "problems" to the individuals involved, occuring in the "First world", but result in vastly different outcomes for the short and long term lives of the individuals.
What if you live in, for example, Greece? As a country likely to drop off several definitions of "first world" country soon, does this mean they suddenly have their problems justified for whinging about? Is poverty in Australia less worthy than poverty in Uzbekistan?
Perhaps a "first-world problem" is complaining about circumstances only likely to be encountered in highly developed countries, such as "I hate it when iTunes won't sync with my iPhone" or "the damned Government put a cap on the baby bonus, now my husband and I won't get it when our child is born, as we have a combined income of over $150k", or "I paid sooo much tax last year because my income is in the highest bracket". These would be more frivolous worries for sure.
At the end of the day, you never know what someone else's thoughts or feelings about an issue are, or what is happening in their life for a reaction to occur in a circumstanced you perceive it shouldn't. To say that someone else's problems are not valid is very insular and narrow minded. That person you see who appears to have a good life, but is depressed shouldn't "just get over it"- as you probably don't know what is really happening, and having a Mercedes or house does not solve all your problems. Do you know they didn't recently lose a child, partner or friend? Do you know they don't have cancer, are living in an abusive situation or have been raped?
Consider the road less traveled- instead of socially ostracising them because you don't like to hear how they're feeling down, try listening, or even trying to understand. At the very least, try not to make it worse by being judgmental or bitchy!