[Mexican Spanish (perhaps originally in tacos de minero, "miner's plugs," tacos made from tortillas wrapped around a simple filling and briefly fried, such tacos being so called because of their resemblance to the explosive charges, consisting of gunpowder in a paper wrapper, that were plugged into the rock face by Mexican silver miners), from Spanish taco, plug, wad; akin to Italian tacco, chock, wedge, perhaps of Germanic origin and akin to Old English staca, stake.]