Cuckberry

A man who gains sexual pleasure in the knowledge that his lover has made love or is making love to other men. Cuckberrys are usually submissive, often have a small penis, suffer from premature ejaculation, 'enjoy' sexual humiliation and are rarely able to satisfy their male partners.

A fishing trip cuckberry

Jon watched anxiously as his partner Jizzy got railroaded in the ass by Brando, while the others went fishing