run out of gas

listen to the pronunciation of run out of gas
İngilizce - İngilizce
(deyim) Suddenly lose the energy or interest to continue doing what you are doing
out of gas
: lacking fuel

The lawnmower was out of gas so he decided to let the grass grow.

out of gas
Tired; lacking energy or motivation

After twelve hours straight at the office, he was about out of gas and decided to go home and rest.

run out of
use up the supply, exhaust an inventory
run out of gas