Populism is a political position which holds that the virtuous citizens are being mistreated by a small circle of elites, who can be overthrown if the people recognize the danger and work together. The elites are depicted as trampling in illegitimate fashion upon the rights, values, and voice of the legitimate people.
The notion itself is quite subjective of course, but it is definitely very different from "democracy".
[1] http://journals.cambridge.org/download.php?file=%2FPPS%2FPPS...
The only reason why it seems more "democratic" is because for most of human history, the wealthy elite had way to much power compared to everyone else.
The common man may think he knows everything, but he really doesn't.
[1] http://journals.cambridge.org/download.php?file=%2FPPS%2FPPS...
Historical evidence suggests that such leaders tend to move towards to political extremes.
We already know how easy it is for yellow journalism to sway popular opinion; expecting direct democracy to be able to deal with the subtle nuances of governing a millions-strong society is nice in theory, but simply isn't practical.
Imo it goes down to what your message is - both Trump ans Sanders are populists.
Populism is just catering to the short term needs, even basic ones, just to get attention/votes/support.
Populist example from Romania: get an IMF loan in order to increase pensions. Text-book example of shooting yourself in the foot long term, but a very popular action among pensioners, which are a large voting demographic.