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A toilet
This is Australian slang
It is called a thunderbox because sometimes when you go to the loo you fart, and it sounds like thunder. I don't think I have to explain the box part.
Ah that felt good! I did a big one in the thunderbox just now! Boy it smells!
by Guang September 18, 2005
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A box built for shitting in. Often found on campsite grounds.
I really let loose with a storm of poop on the thunderbox.
by Graham February 01, 2004
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Evelyn Waugh, *Men at Arms*:

"Well if you *must* know, it's my Thunderbox."
"May I see it?" he asked reverently.
"I don't see why not," said Apthorpe. "As a matter of fact I think it will interest you; it's pretty neat, a type they don't make any more. Too expensive, I suppose."
He went to the cupboard and dragged out the treasure, a brass bound, oak cube.
"It's a beautiful piece of work really."
He opened it, showing a mechanism of heavy cast-brass and patterned earthenware of solid Edwardian workmanship. On the inside of the lid was a plaque bearing the embossed title *Connolly's Chemical Closet*.
"I got it from a High Court Judge, the year they put drains into the Government buildings at Karonga. Gave him five pounds for it. I doubt if you could find one for twenty to-day. There's not the craftsmanship any more."
by isaac32767 July 29, 2010
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An Aussie slang word for W.C or bog for the less educated
Where's David? Can't you hear he's in the thunder box
by paul May 07, 2005
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the name for vagina due to the sound it makes when queefing after removal of a penis or object from inside it
did you hear that bitches thunderbox when i pulled my fist out of it
by luluboogy January 02, 2017
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