out of order; faulty.
go blooey, to go totally out of commission; break down completely: If the generator fails, the whole system will go blooey.
Origin of blooey
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
"ruin, smash," 1915, U.S. slang, probably imitative.
Online Etymology Dictionary, © 2010 Douglas Harper