Guards Guards - M Word

“Er, just one thing, Captain,” said Colon urgently, to Vimes's astonished eyes. “You don't use the 'M' word. Gets right up his nose, sir. He can't help it, he loses all self-control. Like a red rag to a wossname, sir. 'Ape' is all right, sir, but not the 'M' word. Because, sir, when he gets angry he doesn't just go and sulk, sir, if you get my drift. He's no trouble at all apart from that, sir. All right? Just don't say monkey. Ohshit.”

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Guards Guards - p169