Griefend Share definition Flag The last weekend of grieving over a relationship. Often includes eating, drinking, crying, laughing, and general "getting over it". "Dude, I had the best griefend. I'm so over Jonny now! Time to really start having fun!" Griefend by BradnShaw April 11, 2010 0 0 Get merch Get the Griefend mug. Buy Now — $32.95 See more merch