Oh my lanta moment. Share definition Flag An Oh my lanta moment happens when some one of the age of 20+ punches a toddler and below. Oh my gosh Greg why did you punch that newborn this is a real Oh my lanta moment. Oh my lanta moment. by Aagag December 11, 2019 0 0 Get merch Get the Oh my lanta moment. mug. Buy Now — $32.95 See more merch