washlet
A bidet shower, bidet seat, or similar bathroom product meant to cleanse the user.
Toto doesn’t sell its washlets in big-box stores like Home Depot, preferring the showroom experience instead. […] Most washlet owners, then, are converted after trying one out in the world.
Where it comes from
From a trademark registered by Japanese company Toto Ltd. Re-borrowed from Japanese ウォシュレット (woshuretto). Blend of wash + toilet, or wash + -let.
Adapted from the Wiktionary entry washlet (CC BY-SA 4.0).