¡Ya basta! is a phrase in Spanish roughly approximate to "Enough is enough!" in English. It has been adopted by several Latin American insurgent groups as an expression of affront towards issues that sparked the original dissent. Its adoption by the EZLN in Mexico as the movement's motto is exemplary of its popularity and ability to rally diverse ideologies under a common goal. Grammatically, there's little difference between ¡Basta ya! and ¡Ya basta!, and both are correct.