Hillsburrito Share definition Flag A common Oregonian slang term for Hillsboro, Oregon. Due to it's dominant population of Hispanics. Hey me and Misti went out to Hillsburrito to pick up a couple tacos from a roach coach. Hillsburrito by JohnnyTwentySix August 24, 2005 0 0 Get merch Get the Hillsburrito mug. Buy Now — $32.95 See more merch