French high five Share definition Flag When 2 men walking sideways, back-to-back pass each other and rub asses; usually on accident, in a tight space. Guy 1, "Did we just rub asses?" Guy 2, "Yeah we French high fived." French high five by chriswith2ds July 17, 2011 0 0 Get merch Get the French high five mug. Buy Now — $32.95 See more merch