jack-in-the-box
🇺🇸
/ˈdʒæk ɪn ðə bɑːks/
🇬🇧
/ˈdʒæk ɪn ðə bɒks/
A toy with a box that has a figure, like a clown, that pops up when you lift the lid.
The little girl was delighted when the clown in the jack-in-the-box suddenly appeared.