Notes

Let me take the time to explain this to you and /u/mrsamsa very clearly, as I am not sure if you are taking the metaphor literally because you are genuinely stupid, or because you just haven't taken the redpill yet. By "what is happening in our colleges" I meant the Cultural Marxism taking place, that is why I did not find it surprising you were leftwing. "Cuck" indeed has a deep meaning and is not just a "childish" insult, if used carefully.

Berniecuck, leftycuck, commiecuck, betacuck, or even quite simply cuck in contemporary political discourse refers to many different aspects in which the left "cucks" themselves or others. For example, when you take someone's wealth and let others abuse it, you are cucking that person. The wealth is metaphorically the same as the wife in the traditional cucking phenomena in this example.
Similarly, when you let others take advantage of your country, your country is akin to the wife you are letting be abused. You may also be cucking yourself somewhat more literally by putting your own family at risk for the benefit of others. In this case, your family may be attacked, robbed, or your wife may even be raped which is literally cucking in this case. Or, you may be cucking your culture and history, your ancestors, thus leading to degeneracy. Globalism also allows your country to be cucked (taken advantage of by others).

In additional, cucking refers to personal characteristics such as weak, submissive, and cowardly as these are the same characteristics seen in more traditional or classical cuckery.