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1.
When a hipster becomes overweight they develop what is known as a "pork belly". sometimes pork belly is used to describe a person who has glutted his or herself on faddish things to the point of compete overdose. Too much of a (formerly) good thing.
Brian's flannel work shirt would no longer button over his pork belly.
by Horno Magico November 07, 2012
 
2.
is something you call somebody when the person is overweight
that rick guy is a total pork belly
by loachjohn June 08, 2009