inter-hot-undies Share definition Flag inter-hot-undies is when you sit too long using the internet and your undies end up jammed. OH! I'm so uncomfortable, after sitting here for 3 hours using the internet my "inter-hot-undies" are in a jam. inter-hot-undies by Mama Geri July 17, 2007 0 0 Get merch Get the inter-hot-undies mug. Buy Now — $32.95 See more merch