be running on empty
have exhausted all your resources or sustenance
1998 - New Scientist - Bateson concluded that a hunted deer may be running on empty for 90 minutes. But Harris argues that this period will be just a few minutes.
RELATED IDIOMS :
a person whose children have grown up and left home – informal
empty vessels make most noise = empty vessels make most noise sound
those with least wisdom or knowledge are always the most talkative – proverb
Vessel here refers to a hollow container, such as a bowl or cask, rather than a ship.
be running on empty :
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