정신없이

in a hectic rush, frantically

정신 alertness; presence of mind + 없 not have, be without; be absent, not exist + 이 Forms nouns or adverbs, often meaning ‘person or thing characterized by’ or ‘in a manner or degree of’
adverb Rare #23,547
in a hectic rush, frantically
KO: 아침부터 정신없이 일했어요.
EN: I’ve been working frantically since morning.

정신없이 바쁜 하루를 보냈죠

You had a crazy busy day, didn’t you?

— 신경쇠약 직전의 여자 (1988)

아주아주 시원하게 마신 다음에 자, 이젠 정신없이 뛰어요!

After you’ve had a nice, cold drink, all right, now run like crazy!

— Il Mare (2000)

심장이 또 말썽 이야 정신없이 뛰어

My heart is acting up again—it’s racing like crazy.

— TAR 타르 (2022)