Top Definition
The theory that people prefer the method in which their mom made tuna and potato salad over all other methods.
"I bought potato salad from the deli, but it's not like Mom used to make!" It just goes to show that The Tuna Fish & Potato Salad Theory is true.
by wiggy_G November 14, 2009
5 Words related to The Tuna Fish & Potato Salad Theory

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