Top Definition
The last part of a beer, comprised mainly of flat beer and grose fizz. Smells like shit. Prominent in beer pong...
"Shit mayne! Rest of this cup tastes like poo sap!"
#poo #sap #beer #beer pong #red cup #flat
by Shwandito Filiwyperson January 08, 2008
6 Words related to poo sap
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