be/run low

run low

To near the end of a supply of something. We're running low on paper towels right now, so use them judiciously.
See also: low, run
Farlex Dictionary of Idioms.

run low (on something)

to near the end of a supply of something. We are running low on salt. It's time to buy more. The car is running low on gas.
See also: low, run
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.

be/run ˈlow (on something)

not have much of something left: We’re running low on fuel. Do you think we’ll have enough to get home?
See also: low, run
Farlex Partner Idioms Dictionary
See also:
  • run low
  • have a low opinion of (someone or something)
  • low ebb
  • a low ebb
  • fly low
  • not so bad
  • high and low
  • at a low ebb
  • in low water
  • a peg too low