He worked all night and is now out on his feet.
out on one's feet
idiomStanding erect but not consciously aware of one's surroundings, or only minimally aware, and having little or no ability to control one's bodily actions, as a result of physical injury or exhaustion.
Origin
disputed originFrom the sport of boxing, referring to fighter who is too stunned to fight effectively, but who does not collapse to the canvas.
After running the marathon in the heat, the exhausted athlete was out on his feet and needed help to reach the finish line.
Following three consecutive days of emergency surgery, the weary doctor stood out on his feet, barely able to process the nurse's urgent report.
- 01
abound in one's own sense
To follow one’s own inclinations and opinions.
- 02
ace up one's sleeve
A surprise advantage of which others are not aware.
- 03
act one's age
To behave in a manner appropriate to one's age.
- 04
act one's age, not one's shoe size
Synonym of act one's age (“to behave in a mature manner; to avoid being childish”).
- 05
afraid of one's own shadow
Exceptionally timid.
- 06
air one's dirty laundry in public
To reveal one's sordid secrets to the public.
- 07
air one's dirty linen in public
Synonym of air one's dirty laundry in public.
- 08
albatross around one's neck
A characteristic, possession, associate, or previous deed that hinders one's ability to succeed.
Last updated July 12, 2026