on the blink
Also, on the bum or fritz. Malfunctioning, out of order, broken, as in The TV is on the blink again, or You driveour car's on the bum. The first of these slangy expressions dates from the late 1800s and possibly alludes to an electric light that flickers on and off ("blinks"); the second, from the same period, possibly is derived from bum in the sense of "a contemptible person"; the third, fritz, dating from about 1900, is of unknown origin.
Dictionary.com presents 366 FAQs, incorporating some of the frequently asked questions from the past with newer queries.