1 definition by MiloJR

A derogatory term typically used describe male, left-leaning young people who align themselves with political correctness, 'Bernie Sanders' brand socialism,' and their perception of social justice. A cuck holds identity politics and virtue signaling in higher regard than any desire for success, and they often have little to no pride in their identity or culture, as in their eyes doing so is to be a nationalist, white supremacist bigot. They are often outspoken, intolerant of views that they do not agree with and quick to charge anyone who may disagree with their worldview as racist, sexist, homophobic, etc. They are more likely to respond to race-bating rhetoric than reasoned debate.

It appears as if the majority of the other definitions here were written by cucks who are triggered by the term.

Conservative: I like Trump's stance on free trade and border security.
Cuck: How can you support someone as blatantly racist, misogynistic and homophobic as Trump?!?!? You are just a white supremacist and your opinions are therefore invalid.
Conservative: I like Trump's stance on free trade and border security.
Cuck: How can you support someone as blatantly racist, misogynistic and homophobic as Trump?!?!? You are just a white supremacist and your opinions are therefore invalid.

Conservative: Typical cuck response... Come back when you are not so bigoted and able to debate me with facts and actual opinions rather than empty charges of racism.
by MiloJR April 8, 2017
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