Horse-hung

I was in a seated position, my ass resting on the stranger's fantastic endowment. My hands reached behind me for support, but the horse-hung mystery man had me, his arms clamped around my chest.

Source: wiktionary

His young playmate had mentioned the Club had lost its only horse-hung top and the members were unhappy about that.

Source: wiktionary

"This damned thing", as it turns out, is his cock, which he manhandles for additional emphasis, squeezes, twists, pets, prods, paws, with an accompanying little dance, complete with knee squats that finally, it would seem, provide his hard prick with a better-than-original alignment. As well, I might add, as making it all the more evident that the kid is not only cowboy-cute but cowboy-horse hung.

Source: wiktionary

The more muscle a man had the harder Drew's cock got, especially if he was black, especially if his skin was a dark as chocolate and his crotch bulged with a horse hung dick and nuts the size of billiard balls.

Source: wiktionary