cats' concerts

Noun

cats' concert (plural cats' concerts)

1. The cacophony of meows, hisses, and other vocalizations that cats make during a period of social interaction.
   • On the night in question, the whole house was awakened by a dreadful cats'-concert. Two or three of the gang of ill-bred, shabby cats that ran wild over the brick roofs of our town were sitting on the general's terrace screaming at the top of their repulsive voices.1976, Valentin Kataev, A Mosaic of Life Or, The Magic Horn of Oberon: Memoirs of a Russian Childhood, page 180
2. (broadly, figuratively) Any confusing or intolerable combination of voices.
   • One of the most horrible sounds imaginable is that produced by several fine voices all singing different songs. This cats' concert (as school-girls call it) results in a shocking and yet ludicrous discord, equally frightful and laughable. And yet all the performers are singing individually well....1839, Eliza Leslie, Miss Leslie's Behaviour Book: A Guide and Manual for Ladies, page 332