on the blink
Definition from Wiktionary, the free dictionary
Presumably from an appliance with poor electrical connection blinking from intermittent connection, or from a flickering TV screen.
- (idiomatic) functioning erratically, malfunctioning; not working or not working well. Usually refers to a mechanical or electrical device.
- My toaster is on the blink, making either charcoal or cold bread.
- (malfunctioning): on the fritz