system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does Americans call left wingers "liberals", when Europeans call right wingers "liberals"

You constantly see people on the left wing  being called liberals (libtards, libcucks, whatever you like) in the USA. But in Europe, at least here in Denmark "liberal" is literally the name of right wing party. 

Is there any reason this word means the complete opposite depending on what side of the Atlantic you use it?

Edit: Example: Someone will call me "Libtard cuck" when in reality I'm a "socialist cuck" and he's the "liberal cuck" ?
gpt
When Americans are talking about liberals, they are referring to social policies usually, (what is commonly referred to as "the left") when Europeans use the term they are referring to economic policies (what is commonly referred to as the "right").

In the US long gone is the time when there was any real challenge to liberal (i.e. free market) policies, whereas in Europe where socialist and even communist or anarchist parties continue to exist, the term defines where some parties lie not socially but economically. Whereas people on the "left" are simply called leftist.

Whether or not a real "left" and "right" still exists is debatable if you ask me, and these seem more like vestigial terms inherited from the early part of the 20th century when the divide was more evident, and when social liberalism was fundamentally anti-capitalist, unlike for example the CDU in Germany, which is relatively economically to the right, but socially still more to the left that even the most leftist of US Dems.

tl;dr - One refers to social policy. The other to economic.