Can refer to a physical blow or a metaphorical one.
Recibí un capirotazo en la cabeza durante el juego.
I received a blow with a hood to the head during the game.
Recibió un capirotazo en la cabeza durante la pelea, lo que lo dejó aturdido por un momento.
He received a blow with a hood to the head during the fight, which left him dazed for a moment.