I was so exhausted I felt like I was sleeping on my feet at work today.
Я был настолько уставшим, что чувствовал себя спящим на ходу на работе сегодня.
Definitions
To be extremely tired or exhausted, to the point where one feels as if they could fall asleep while standing up; often used figuratively to describe someone who is very fatigued or drowsy.
