oh my giddness Share definition Flag Variation of Oh My Giggles, but with giddy-goodness. Girl: Who just texted you? Other Girl: My boyfriend. Girl: Oh my giddness! oh my giddness by kittykatmeowofdeath March 28, 2011 0 0 Get merch Get the oh my giddness mug. Buy Now — $32.95 See more merch