Teapa Municipality is a municipality in the Mexican state of Tabasco in south-eastern Mexico. Its name comes from the Nahuatl words "Tetl …Teapa Municipality is a municipality in the Mexican state of Tabasco in south-eastern Mexico. Its name comes from the Nahuatl words "Tetl and apan", which mean "river over stones" or "stone's river". It refers to one of the rivers that crosses the town.