Time I think to adopt the mantle of grumpy old word nerd.

In Shaws, almost literate, in Waterford last week, in the furniture department there was a long chair for sale.
It was (and probably still is) decorated with a laminated sign declaring it to be a Chaise Lounge and stating the price.
There is of course no such thing as a chaise lounge, despite the fact thst the phrase is so consistently misused to have almost become part of folk etymology.
The chair in question is a quite simple Chaise Longue, modern French for long chair.
There is no doubt that its erronious name is due to what one would do if seated on it.