Yeadies Share definition Flag A legendary type of cannabis that is a higher grade than Headies. The amount of crystals on it is so great that it gives the cannabis a whitish color, thus looking like a yeti. Guy1: Man these headies are dank dude! Guy2: Nah man... this shit is Yeadies. Yeadies by Pecos from Newlandia May 5, 2009 Get the Yeadies mug.