bash someone's head

1.
General Englishinformalvulgarviolent
- To strike or beat a person's head with great force, typically causing severe injury or death.
- To crush, smash, or violently assault someone, with the head as the target or with the intent of causing grievous bodily harm.
2.
General Englishinformalfigurative
- To defeat, overwhelm, or rebuke someone decisively or brutally, often used figuratively rather than to describe literal violence.

Examples:

EN: I don't want to get graphic or anything, but... wouldn't it be difficult to simultaneously bash someone's head in while servicing him?
ES: No quiero ser muy gráfica, pero... ¿no es un poco difícil golpear con fuerza la cabeza de alguien, mientras le estás haciendo un favor?
EN: Yeah, well, in mine, someone standing between you and half a billion dollars is a damn good reason to bash someone's head in.
ES: Esa ha sido siempre mi experiencia. Bueno, sí, según la mía, a alguien que se entrometa entre usted y medio millar de dólares tiene un buen motivo para golpearle en la cabeza.
EN: How do you bash someone's head in from behind if you're in a wheelchair?
ES: ¿Cómo lo atacaría por la espalda sentada en una silla de ruedas?
EN: Did he bash someone's head in?
ES: ¿Le machacó la cabeza a alguien?
EN: That's what it sounds like when you bash someone's head.
ES: Así suena cuando golpeas la cabeza a alguien.
ID: Begitu bunyinya saat memukul kepala seseorang.
EN: I don't want to get graphic or anything, but wouldn't it be difficult... to simultaneously bash someone's head in while servicing him?
ID: – Baiklah. – Melibatkan dua orang. – Korban dan pembunuh.