adverb, adverb taking the 'to' particle
Onomatopoeic sound of hitting, slapping, clapping, or a sharp impact. Often used with と.
彼は机をパンパンと叩いた。
He slapped the desk with a bang.
子供たちが手をパンパンと叩いて喜んだ。
The children clapped their hands in delight.
na-adjective
bulging; filled to bursting
Describes something stretched tight or packed full, such as a stuffed bag or a full stomach. Used as a na-adjective.
お腹がパンパンでもう食べられない。
My stomach is bulging; I can't eat any more.
かばんがパンパンでチャックが閉まらない。
The bag is so stuffed that the zipper won't close.
noun
prostitute (catering to Occupation soldiers after WWII)
Only with reading パンパン
Historical term for street prostitutes who served Occupation soldiers in post-WWII Japan. Often used in the compound パンパンガール. Restricted to the katakana reading パンパン.
See also: パンパンガール
戦後、街角にはパンパンと呼ばれる女性たちが立っていた。
After the war, women called panpan stood on street corners.