Gandalf High-five Share definition Flag A Gandalf High-five is an awesome type of high-five which is reserved to only those who have met Sir Ian Mckellen. Jason: eeeeeeh, I met Ian Mckellen. Michael: Gandalf High-five!!!!!*HIGH FIVE takes place* Gandalf High-five by corbane December 8, 2010 0 0 Get merch Get the Gandalf High-five mug. Buy Now — $32.95 See more merch