Definition of thunderbox in English:
A primitive or makeshift toilet.
- He sends in a message on a piece of loo roll (honestly, it's true) suggesting he had tried the sandwich and ‘I'm still in here (the thunderbox)!’
- On at least one noxious occasion Mad Max barked orders to her as he sat astride a thunderbox, a horrendous experience for anyone of a sensitive disposition.
- When they tore ivy full of birds' nests from the walls, they replaced it with 36 sparrow boxes; the thunderbox loo has an inbuilt heater.