Legally Obligated Share definition Flag A phrase jokingly said when something is done so often, it has to be a law. If someone says "Red Robin," you are legally obligated to say "Yum" immediately afterward. Legally Obligated by Ubeenbamboozledson August 2, 2020 0 0 Get merch Get the Legally Obligated mug. Buy Now — $32.95 See more merch