English: You’ve got one foot in the grave, and the other on a banana peel
collected: Ridgewood, Queens (03-27-2016)
origin: He heard it in North Carolina, from a contractor who was talking about a friend who was old and really clumsy and careless. Meaning you’re on the verge of death at any moment. Such an understated, witty quip combined with a slapstick visual component is common to North Carolina humor.