" He removed his hat, something a wizard doesn't ordinarily do unless he's about to pull something out of it, and handed it to the Bursar. Then he tore a thin strip off the bottom of his robe, held it dramatically in both hands, and tied it around his forehead.
"It's part of the ethos," he said, in answer to their penetratingly unspoken question. "That's what the warriors on the Counterweight Continent do before they go into battle. And you have to shout --" He tried to remember some far-off reading. "-er, bonsai. Yes. Bonsai!"
"I thought that meant chopping bits off trees to make them small," said the Senior Wrangler.
The Dean hesitated. He wasn't too sure himself, if it came to it.
But a good wizard never let uncertainty stand in his way.
"No, it's definitely got to be bonsai," he said. He considered it some more then brightened up. "On account of it all being part of bushido. Like...small trees. Bush-i-do. Yeah. Makes sense, when you think about it."
"But you can't shout 'bonsai' here." said the Lecturer in Recent Runes. "We've got a totally different cultural background. It'd be useless. No one will know what you mean.
"I'll work on it, " said the Dean.* "

― Terry Pratchett , Reaper Man (Discworld, #11; Death, #2)