Porcelain Throne - What does porcelain throne mean?

Porcelain Throne is slang for "Toilet." See an example of how people use it.
A porcelain throne is a fancy name for a toilet. It comes from the porcelain material used to make toilets and the royal seat a king or queen sits on.

Culture Shock! And The Porcelain Throne

Clean Your Porcelain Throne - Bleach Pray Love

Porcelain Throne

Game of Thrones Fans Can Turn Their Toilets Into The Iron Throne With Decals

Culture Shock! And The Porcelain Throne

The Enchanted Toilet

dad one who masters sleep keeper of the porcelain throne and teller of the best dad jokes see also go ask mom Father's day - FridayStuff

The Witch's Toilet

Would you like to eat while sitting on a porcelain throne?

Culture Shock! And The Porcelain Throne

porcelain throne – Have Wind Will Travel

A 2000trees Instagram post taking - 2000 Trees Festival

The Porcelain Throne : r/funny

Spa, Royale High Wiki

Royal Toilet Throne