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1 definition by Pookie the Destroyer

 
1.
The famed breakfast sandwich from Sheetz, a gas station/convenience store chain prominent in Western Pennsylvania.

The "Shmuffin" consists of a breakfast meat, egg, and cheese on an English Muffin.

Derivative from "Sh"eetz and English "Muffin."
"I'm going to Sheetz to buy a Shmuffin and a cup of Coffee."
by Pookie the Destroyer February 18, 2009