potthead Share definition Flag Weedsmoker. A man who love marijuana. -Is this a weed, man?!? -Yeah. Why? -Oo you'r a potthead..! potthead by Nadejda Rado XpensivE November 9, 2008 0 0 Get merch Get the potthead mug. Buy Now — $32.95 See more merch