This word is acceptable for play in the UK dictionary that is being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. A close-stool, a stool enclosing a chamber pot.

n. A rudimentary outside toilet.

"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."

thunderbolt    tinderbox