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1.
A food that is delicious and awesome while you're eating it, but afterwords you feel dirty or sick.
Dude I ate the whole bag of cheeto's man. I feel like shit now, fuckin porn food.
by daboyfromdasouth June 25, 2010
 
2.
Food that has little nutritional value or is naughty for you, typically fast food.

Let's go get pornfood for lunch, do you want to eat at Taco Bell or Mc Donalds?
by Sheila Siffermann October 09, 2007