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1.
1. Any innutritious substance purchased at a quickie mart or gas station that one takes pleasure in eating but does not like to admit that one eats.

Combining am/pm jalapeno poppers, a slim Jim and a red bull for dinner is food of shame.
"I'm having food of shame for dinner. Don't tell my boyfriend."
"The hotdogs at 7/11 are so food of shame."
by Anne Buster November 09, 2006