"Far right" is one of those ambiguous political terms (like "homophobic") which means one thing literally, but is used instead in a loose sense to mean something almost completely different - typically in an effort to disparage someone's character and/or position.
Historically the chief "far right" politician of the twentieth century was fascist warmonger Adolf Hitler, leader of the National Socialist Party (see Nazis). The main difference between Hitler and other totalitarians (like the Josef Stalin of the Soviet Union is that they were war enemies. The systems of government and economy they imposed on their respective empires had more similarities than differences.
In the US, Europe, and the Middle East opponents of democracy typically apply the term "far right" to anyone who criticizes their human rights record or plans to replace the free market system with socialism. The idea behind this sort of name-calling is to associate the critics with the "worst mass murderer ever" (i.e., Adolf Hitler). This is erroneous, if only because both Stalin and Mao Tse-Tung killed at least six times more innocent people.