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1.
Drunk as hell. A person does not percolate or become percolated. Instead, they reach the point of a drunken stupor and are "on percolation."
Woke up in the morning on percolation..." E-40, "Smebbin
by Tre Dizzle May 15, 2011
 
2.
Colloquial. The process whereby intestinal churning and tumult cause gases trapped in the digestive tract to become infused with particulate fecal matter, resulting in dense, suffocating flatulence capable of leaving a residue.
Despite the elimination of coffee from the menu, percolation remains commonplace at Taco Bell.
by theexalted April 18, 2009