ぽこっと

adverb

wide open; gaping; agape

Describes something opening suddenly or being left wide open, often with a sense of emptiness or surprise. Similar to ぽっかり, but ぽこっと can feel lighter or more abrupt.

See also: ぽっかり

• 箱はこのふたがぽこっと開ひらいた。

  The lid of the box popped open.

• 彼かれは口くちをぽこっと開あけて驚おどろいていた。

  He was surprised with his mouth hanging open.