- a mental hospital; insane asylum.
Origin of nut house
First recorded in 1900–05
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for nut house
"Say, this island'll be a nut-house if this keeps up," Pete Murphy said irritably.Angel Island
Inez Haynes Gillmore