CUCK

A Cuck is a man whose wife or girlfriend has cheated on him. Usually a cuck will know about her indiscretion, and instead of dumping her ass, he will be unable to leave out of weakness.

The term Cuck comes from the Cuckoo Bird, who just like the modern female human, will get knocked up by a male, then go and drop her eggs in another nest for another male to provision for. I can’t even make this shit up. This is a real thing. It’s like reverse child support in the bird world.