Gizmo Share definition Flag Gizmo is a name that you give to a house pet.Gizmos are usually bad ass and dickheads but they can be cute and can eat mayonnaise off a spoon. Person#1Hey is that Gizmo taking my steak off the platesPerson#2Hes fucking a blanket to Gizmo by Big papa love February 24, 2021 0 0 Get merch Get the Gizmo mug. Buy Now — $32.95 See more merch