The sexual act of baking a potato in the oven until it is completely cooked, inserting it into a vagina, while the male covers his penis with butter and salt. The couple then has sex, mashing the potato. After sex the couple can 69 and have a snack as well. T.L. 2K16
Awe man, T.L. totally did the Idaho hot potato with my girlfriend again.
by T.l.710 February 8, 2016
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