'loony bin' definitions:

Definition of 'loony bin'

From: WordNet
noun
Pejorative terms for an insane asylum [syn: Bedlam, booby hatch, crazy house, cuckoo's nest, funny farm, funny house, loony bin, madhouse, nut house, nuthouse, sanatorium, snake pit]

Definition of 'loony bin'

From: GCIDE
  • loony bin \loony bin\ (l[=oo]n"[y^] b[i^]n) n. An institution for the confinement or treatment of insane persons, such as an insane asylum or the psychiatric ward of a hospital. [slang]
  • Syn: mental institution. [PJC]