パンパン

Etymology 1
The adverb, attested from the 19th century, is. The related adnominal is attested from the 20th century.

Adverb

 * 1)  bang, pow
 * 1)  bang, pow

Adnominal

 * 1) bulging, about to burst, overstuffed

Etymology 2
. This noun is attested from the 1940s. Multiple theories include:
 * Possibly from as a WW2 slang. Compare  🇨🇬, 🇨🇬, 🇨🇬, 🇨🇬. See also
 * Possibly from.
 * Possibly a semantic shift from the onomatopoeia, perhaps in reference to clapping hands to attract a prostitute

Noun

 * 1)  a sex worker, prostitute, especially one catering to occupying soldiers after World War II