“Yeah!" said the Dean, now in a grip of a wild, unwizardly machismo. "We're mean! Yeah! Are we mean?"
The Archchancellor raised his eyebrows, and then turned to the rest of the wizards.
"Are we mean?" he said.
"Er.. I'm feeling reasonably mean," said the Lecturer of Recent Runes.
"I'm definitely very mean, I think," said the Bursar. "It's having no boots that does it," he added.
"I'll be mean if everyone else is," said the Senior Wrangler.
The Archchancellor turned back to the Dean.
"Yes," he said, "it appears that we are all mean."
"Yo!" said the Dean.
"Yo what?" said Ridcully.
"It's not a yo what, it's just a yo," said the Senior Wrangler, behind him. "It's a general street greeting and affirmative with convivial military ingroup and masculine bonding-ritual overtones."
"What? What, like 'jolly good'?" said Ridcully.
"I suppose so..." said the Senior Wrangler, reluctantly.”
―
Terry Pratchett,
Reaper Man