Mexi-fix Share definition Flag To repair something using articles on hand, generally in a non permanent fashion. Juan and Pablo didn't have any thorium enriched lead shielding , so they Mexi-fixed the nuclear reactor with duct tape and bubble gum. Mexi-fix by JuaninPablo April 28, 2010 0 0 Get merch Get the Mexi-fix mug. Buy Now — $32.95 See more merch