sick room
n.— «Mold in classrooms. This is so common in our schools that there is a term for it: “sick room,” meaning that black mold grows on the walls of the classroom.» —“Vote ‘yes’ to improve schools” by Angie Swiger Press-Register (Mobile, Alabama) Jan. 28, 2007. (source: Double-Tongued Dictionary)
Further reading
The words cushy, cheeky, and non-starter all began as Britishisms, then hopped across the pond to the United States. A new book examines what happens when British words and phrases migrate into American English. Also, if you speak a language besides...
Wilson in Charleston, South Carolina, stopped using the term conversate after being told it’s not a real word. On the contrary, conversate is well-established in Black English as a verb that suggests speaking in a register that’s warmer...