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1.
A lot of food. Variation on the phrase "i could eat a horse between two matresses"
I could eat a scabby horse
by davey crockett February 10, 2005
 
2.
Something unappetizing that you'd eat anyway because you are SO hungry
Is dinner ready? I'm starving, I could eat a scabby horse!
by sosige1 February 19, 2013