1430, "plug, bung," from M.Fr. tampon, nasalized variant of O.Fr. tapon "piece of cloth to stop a hole" (1382), a suffixed form of Frank. *tappo "stopper, plug," related to O.H.G. zapfo and O.E. tæppa "stopper" (see
tap (2)). Meaning "wooden plug for the muzzle of a gun"