[ヤングラいちば, yangura ichiba] (n) young underground market (the underground economy in goods and services, involving lots of barter and buying and selling of secondhand goods)
[よしわらことば;よしはらことば, yoshiwarakotoba ; yoshiharakotoba] (n) (See ありんすことば) language used by the harlots of the Yoshiwara red light district during the Edo period