Wiktionary
horse cock
alt. 1 (context countable vulgar slang English) A very large penis. 2 (context uncountable slang chiefly military English) sausage such as baloney or salami. 3 (context uncountable slang English) nonsense, bullshit. n. 1 (context countable vulgar slang English) A very large penis. 2 (context uncountable slang chiefly military English) sausage such as baloney or salami. 3 (context uncountable slang English) nonsense, bullshit.
Usage examples of "horse cock".
He was ready, the veins about to burst, hard as iron, bigger than he'd ever been, big as a stallion's gun, a horse cock.