“Indoor plumbing comes along, and there is already a room with a bath, the bathroom, so where do you put the toilet? Just put it in a closet; it’s the easiest place to put a toilet.”

They subsequently earned the nickname “water closets” since they were among the few locations in the house with running water.

“To start, WC is an abbreviation standing for ‘water closet’, a name used in the 1900s for a toilet, due to most being fitted in a spare closet or cupboard. Over time, WC has been used instead of bathroom to describe a room with a toilet but no bath,” per Plumb World.

The TikToker then reveals that the acronym WC stands for “water closet.”