It's chemical formula is H(SrCaSm) and is the substance that stimulates witty comebacks, ironic replies, in other words: sarcasm. It can only be handled in small amounts as it has a pH of 0. If someone is overly sarcastic it can appear as an off-white cloud around a person's head.
"Who's the guy with the cloud around his head?"
"Oh, that's Mike. He has excessive amounts of sarcastic acid, it's genetic"