Cuck
A man who allows their wife or girlfriends to have sex with other men. He would also apologies if their wife is cheating on him. A cuck is very different from a simp. A simp is a man with is desperate for pussy and will bend down or bow to a women to get a chance while a cuck is a man who has the pussy but will happily let other men tap or wank to the pussy. A person who is confused for a simp but is actually a cuck is iDubbbz as he has a girlfriend but will happily allowed her to show off her body.
Person 1: "My girlfriend has another boyfriend. I'm so happy for her." Person 2: "Cuck."
By Frixion fred