I asked the 80 Year Old retired philosophy teacher patient if he wanted to take his breathing treatment with a mouthpiece or a mask.
He said, "Mouthpiece. I can use the mask to rob banks."
"That's a good business," I said.
He said, "I live a block from a bank, and the tunnel is halfway there."
Word of the day: Colloquial: Conversational, common, casual, idiomatic, dialectical, vernacular; appropriate to, used in, or characteristic of spoken language or of writing that is used to create the effect of conversation; characteristic of informal spoken language or conversation.
Hospital workers use hospital abbreviations as though they were colloquial.