벼락치기가 · 벼락치기를
cramming (at the last minute)
Example
시험 전날 밤에 벼락치기로 공부했어요.
I crammed for the exam the night before.
Word parts
From 벼락 'lightning' + 치다 'to strike': studying at lightning speed.
Good to know
Common patterns are 벼락치기하다 and 벼락치기로 공부하다.
Related words