Gallaghalism Share definition Flag Gallaghalism is a religion based on listening, accepting and agreeing to disagree. Since I'm a part of Gallaghalism I have to hear you out before I tell you that I don't agree with your views. Gallaghalism by mswestergard September 20, 2013 0 0 Get merch Get the Gallaghalism mug. Buy Now — $32.95 See more merch