hippie grenade Share definition Flag A pot seed in the joint that blows it up like a cigarette load. Rumored to cause sterillity in males. POP! Awww shit, man who rolled the hippie grenade?! hippie grenade by Penith Pumpah March 1, 2007 0 0 Get merch Get the hippie grenade mug. Buy Now — $32.95 See more merch