Who is a 'populist'?

Continuing from my post about the politics behind the use of the word 'moderate' in the Anglo-saxon media, today I'm going to reveal the meaning of 'populist.'

Whenever you see the word 'populist' in description of a politician, you can change it to "an elected politician who has some socialist elements in its economic views."

No matter how much popular a capitalist politician, elected or unelected, is and what kind of methods they use to appeal to the poor, they are never described as 'populist.'