In Colombia it is the common name of a venomous snake. It is also called jargon, mapanare, mapaná or equis. Its scientific name is Bothrops atrox and it belongs to the family Viperidae. It is the snake that causes the most ophidic accidents in Colombia. In Fashions, it is a size prefix that means very or more (xs, is very small, smaller and xl means very large or very long, larger, longer).