A special type of anniversary between two or more close friends and is based around the word "Potato", not for the food but for it sounding cute or appealing, as if it were a cult.

In another words, a friendaversary based around the word "Potato".
Mike : Guess what day it is?
Petra : What?
Mike : Do you seriously not remember?
Petra : It's the 4th... OH
Mike : Glad to be with you for anther year! Happy Potatoversary!
by kauchpotato February 1, 2023
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