hittin' the fattie Share definition Flag Smoking dope, marijuana, weed. Specifically, a blunt. My neighbors were hittin' the fattie downstairs. It stunk so bad, we had to go for ice cream. hittin' the fattie by dOCTOR t1969 July 26, 2011 0 0 Get merch Get the hittin' the fattie mug. Buy Now — $32.95 See more merch