Cuck

Noun / Internet Slang

Cuck refers to a man who lets his significant other engage in sexual activities with others, often other men, and is aware of it. It is typically used as a derogatory term to suggest weakness, submissiveness, or lack of masculinity.

Example: “He’s a total cuck; he doesn’t mind when she goes out with other guys.”
Means: “He allows his partner to sleep with other men, showing submissiveness.”

Example: “They called him a cuck for letting his wife see other men.”
Means: “They insulted him for allowing his wife to sleep with other men.”