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1.
The slight taste of shit that one tastes when rimming the anus of another person.
I stopped eating his ass when I noticed a little brownie backwash.
by Mike Davidson December 28, 2003

Words related to brownie backwash

rimming
 
2.
The melted, soupy leftovers of a hot fudge brownie sundae that was shared by three or more people at a national-chain restaurant.
No one at the table wanted to finish our dessert because all that was left was brownie backwash.
by FoodLuvr January 11, 2004