double in brass(It is a small firm, and everyone doubles in brass when emergencies arise. – Это маленькая фирма, и в случае необходимости каждый её сотрудник работает сразу на двух должностях. VLZ_58)
burn the candle at both ends(No wonder Mary is ill. She has been burning the candle at both ends for a long time. • Joseph's been burning the candle at both ends for weeks, working two jobs during the week and a third on weekends.Val_Ships)
work oneself ragged(When you work yourself ragged, not taking the time you need for your own physical and mental health, it causes you to be less energized and less creative.Баян)
