n. Blow-up doll. Orig.: Dutch people use body-length bolsters to sleep with...or so they claim.

Large sack stuffed with canvas (sails). Sailors used these to wedge themselves in their bunks during rough weather so they wouldn't roll about.

In the time this term was coined dutch women presumably had a reputation for being unresponsive and apathetic in bed. (Things on this front have improved markedly however.)

An inflatable, full body-length sex doll.
(More lifelike versions of the doll have begun to appear on the market in recent history. They're made of more expensive synthetic rubber type materials.)