A colloquial phrase often used in Latin American countries like Chile and Peru, 'partirle pá arriba' generally means to aggressively confront or attack someone physically or verbally.
Examples
- Spanish: Si ese tipo sigue molestando a mi hermana, voy a tener que partirle pá arriba.
- English: If that guy keeps bothering my sister, I'm going to have to confront him aggressively.