...Bloody hell, the girl had some smarts. He let his face contort into a bit of a beaten frown, sitting up in his chair and slinging his arm over the back of it again. "Ecstasy. Is a drug," he replied matter-of-factually, raising his eyebrows. "Makes you go all crazy. Colors and shit." Oops. "Crap. Not shit. Don't say 'shit', it's a bad word."

Because he is an upstanding example of 'good' colloquialisms.