So what kind of comedy would orcs prefer? I’m going to guess that keen observational comedy or political satires really aren’t their thing. I would suspect that their tastes run to simpler fair. Think broad physical humor such as Abbot and Costello. Only as orcs. With swords. And one of them dies at end.
Simple word plays would also probably prove very popular.
“Knock knock.
Who’s there?
The orc.
The orc who?
The orc who’s going to kill you, desecrate your remains, and then burn down your home!”
Though not really comedy, I would imagine that sleight-of-hand would also go over very well.
“And now, sawing a Man in half!” Proceeds to saw a Man in half to riotous cheering.
Despite its simple structures and penchant for bloodletting and outright savagery, I would hesitate to call orc comedy lowbrow. I would imagine there would be a delicate undercurrent to their work, an almost melancholy air as the orc comedians struggle to define and illuminate the rich culture and history of their people. Their examinations of cherished orc traditions, their (perhaps unsubtle) views of the world hold up a mirror to the orc peoples and ask ‘Is this all we are? Can we not find a place where we can all live in peace?’
Actually, no. I’m totally messing with you. Orc comedy basically revolves around orcs killing others and each other horribly. And yes, I majored in English (hence the truly amazing b.s. of the preceding paragraph).
If I had to guess, I would say the Mouth of Sauron got his start as a comedian:

Cheers,
-Jason