一ひと口くち商あきない

noun

immediate deal; deal sealed by a single word

Archaic term for a transaction concluded on the spot with a verbal agreement, without written contract or haggling. Not used in modern business Japanese.

• 江え戸ど時じ代だいの市いち場ばでは、一ひと口くち商あきないで値ね段だんが決きまることも多おおかった。

  In Edo-period markets, prices were often settled by an immediate verbal deal.