The popularity of the Grimace Shake is still felt a year on. This article originally appeared on Memphis Commercial Appeal: What happened to McDonald's Grimace Shake? Viral milkshake yet to return ...

Uncle O’Grimacey, Grimace’s uncle, was introduced in a 1975 commercial to help promote the Shamrock Shake. He hails from the fictional location of Sham Rock, Ireland, and traditionally wears a ...