"Oh." And clearly, it's not the sort of education he's had so far. He makes a note to look the word up later though, because he actually does enjoy thing like expanding his vocabulary and picking things up like that.

There's silence for a moment as he takes another sip of his drink, and by now he can feel his medicine starting to kick in. The dull throbbing in his temples is manageable; if he's lucky, he can hop a bus back to his usual route. "How much do I owe you for the drink?"