Onomatopoeia for a loud popping or slapping sound (e.g., a clap, slap, or something bursting).
玄関のドアをパンパンと叩いてから入った。
He knocked (or slapped) on the front door with a loud sound before entering.
子どもが手をパンパンとたたいて喜んだ。
The child clapped their hands loudly in delight.
風船がパンパンとはじけてびっくりした。
I was surprised when the balloon popped with a bang.
Full; swollen; packed — describing something filled to bursting or someone/schedule that is completely full.
荷物でリュックがパンパンになっている。
The backpack is stuffed full with luggage.
彼は今週は仕事で予定がパンパンだと言っていた。
He said his schedule is packed with work this week.
満員電車でバッグがパンパンに押されていた。
In the crowded train, the bag was being squashed flat.
A historical term referring to prostitutes who catered to occupying forces in Japan after World War II (used in historical contexts; can be sensitive).
戦後の歴史研究では、占領期に『パンパン』と呼ばれた女性たちについての記述が見られる。
In postwar historical studies, there are accounts of women referred to as 'pan-pan' during the occupation period.