Did you mayhaps mean one of these? thunderbolt, tinderbox
Definitions
Wiktionary
- n. historical A close-stool, a stool enclosing a chamber pot.
- n. UK, Australia A rudimentary outside toilet.
Examples
“They returned to the outhouse where the sergeant opened the lid of the thunderbox and shone his torch down the pit, revealing their man up to this armpits in years and years of crap.”
“And a very good-natured gentleman and lady they were, though they were heathens; and talked quite pleasantly to Tom about his travels, till the Powwow man arrived, with his thunderbox under his arm.”
“He will murder me; and break, burn, and destroy my precious and invaluable thunderbox; and then you will have no more thunder-showers in the land.”
“One of our mantests on Telic I involved going into a thunderbox under the midday sun and banging one out.”
“Hoping against hope it was IDF or the mortar pit letting rip, I fapped away until I was on my final throes of ecstacy when lo and behold a fellow Sapper flings open the thunderbox door looking for me when I had the look of a demented sweat drenched clown haunched over like some deviant hunchback of notredame character.”
“I was lucky enough to be a mere bystander in bout of practical joking that started with a Landrover being parked with front bumper against the door of the thunderbox but soon escalated to such highlights as a CS pellet being fired in through one of the air vents of the portaloo whilst the occupant was mid grunt.”
“This has the advantage of being a lot quieter than Harry-Black and you can get several runs around the thunderbox creating several loops of locking wire, before eventually pulling it tight, by which point your victim is powerless to escape.”
“Drive the rover up to the door, blocking the poor victim in, climb on bonnet, and pop smoke down the "chimney" of the thunderbox.”
“The puerile truth, I'm afraid, is that when Mr Bercow crouches like that he looks like a man encountering difficulties on the thunderbox.”
“Aussie, aussie, aussie, oye, oye oye. you folks call everyone your mate whether they are male or female. i just have one mate ... the wifey. plus you folks downunder like to walk down the path to the thunderbox. which is well named. i call it the outhouse which means nothing. and just who is Sheila, anywho?”
Lists
These user-created lists contain the word ‘thunderbox’.
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The Other Side of Silence
A sound garden.
I sound my barbaric yawp over the roofs of the world. --Walt Whitmantin cry, chark, gride, scroop, crepitation, stridulation, swazzle, death-ruckle, cronk, rumble, borborygmus, crowling and 165 more...
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Cloudstreet
From Cloudstreet by Tim Winton. Expect lots of new-to-me words and/or just pleasing words encountered in this book, perhaps mostly Australian slang.
chiack, staggerjuice, thunderbox, patterson's curse, cactus, dreckly, compo, hayburner, mulie, carn, dag, grizzle and 34 more...
Tweets
Looking for tweets for thunderbox.

bilby A dunny! Mar 25, 2010
knitandpurl "He headed for the thunderbox with gulls, terns, shags and cockroaches watching him come."
Cloudstreet by Tim Winton, p 9 of the Graywolf Press hardcover edition Mar 25, 2010