Hashtown Share definition Flag A slang term for the U.S. state of Idaho, which is known for potatoes. (The name is a play on of a hash brown, which is made from a potato) Fun Fact: Most fast food French fries come from Hashtown, or Idaho. Hashtown by Svifias March 11, 2019 0 0 Get merch Get the Hashtown mug. Buy Now — $32.95 See more merch