have had the biscuit
To be no longer functional or useful; to be dead or about to perish. Primarily heard in Canada. This old truck has served me well, but after lasting 20 years, it's finally had the biscuit. Despite the doctor's best efforts, it looked as though I'd had the biscuit.
have had the biscuit
be no longer good for anything; be done for. Canadian informal 1994 Equinox I thought I'd had the biscuit. I was more than 12 kilometres from camp, I didn't have a coat…and it was about 40 below.