Noun: jack-in-the-box (jack-in-the-boxes,jacks-in-the-box) 'ja-kin dhu,bóks
- Plaything consisting of a toy clown that jumps out of a box when the lid is opened
"The child squealed with delight when the jack-in-the-box suddenly popped up"
Derived forms: jacks-in-the-box, jack-in-the-boxes
Encyclopedia: Jack-in-the-box