noun
jack-in-the-box
A toy consisting of a box from which a figure pops out when the lid is opened, often used as a surprise or prank.
子供の誕生日にびっくり箱をプレゼントした。
I gave a jack-in-the-box as a present for the child's birthday.
Standard kanji-kana mixed spelling.
Katakana variant of the first part, sometimes used for emphasis or in informal writing.
Compound of びっくり (surprise) and 箱 (box). The exact origin is uncertain, but it likely arose as a descriptive term for the toy.