Noun, Suru verb, Transitive verb
last-minute cramming; overnight cramming
来週から中間テストだ。一夜漬けじゃ、太刀打ちできない問題ばかりだぞ。今日から始めろよ。Midterm exams start next week. Just cramming the night before won't get you ready. There'll be a lot of tough questions. You should start studying today. Noun
(vegetables) pickled just overnight
original meaning
Also written 一夜漬【いちやづけ】