He hears you talkin' shit. He knows what you've done, you better get ready to clean out your bathtub. And you're filthy mouth out with soap. Stop swearing, dude.
Jervis Tetch was a kind and pure soul who only wanted the best for his bitchy coworker, Alice. No, not the stupid one who screwed with the Queen of Hearts, dude. Anyways, he went ham to impress her ass but she was just like "lol you just wanted to cheer me up i have a boyfriend :)" so the Mad Hatter went mad HAM-mer.
When some moron dares to give one for free, King Candy calls upon the Mad Hatter to take a shit in that bastard's bathtub as a warning sign that Mr. Three's onto the one-giver's ass. Good luck living with yourself and cleaning your bathtub out after that, asshole.