One of my pet peeves of recent years has been the mainstream press:
(1) adopting “populism” as a euphemism for fascism (e.g. “Trump’s populist rhetoric”), which is at best a blurring of the word’s actual meaning (yes, fascists can use populist language, but populism is not their defining feature), and then
(2) applying the word in its original meaning (i.e. mass appeal to ordinary people) to leftists in direct comparison to fascists as if this constitutes a useful insight (e.g. “politicians with a populist message, such as Donald Trump and Bernie Sanders”).