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A brown avalanche is the fecal equivalent of a golden shower.
Hank gave Cecilia $50 for a brown avalanche.

She climbed to the top of a stepladder and gave him his money's worth.
by scodder June 04, 2010
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The often heard avalanche of faecal matter erupting from someone's bowels in a public bathroom...
A: "Dude i was just in the bathroom and the place shook with a damn brown avalanche!"
B: "Sick!"
C Walks in with a pleased grin on his face.
A: "Feeling relieved?"
C: "Oh yeah."
by dj357 December 02, 2007
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