mexi-weed Share definition Flag Weed that is sub-par. Weed that will get you by but will give you a headache. I went to Lucio's house to get some bomb, but instead walked away with a bag of Mexi-weed. mexi-weed by McGullicutty April 26, 2006 0 0 Get merch Get the mexi-weed mug. Buy Now — $32.95 See more merch