Can refer to a hit or blow delivered with a paddle.
El niño recibió un paletazo en la espalda durante el juego de palas.
The boy received a blow with a paddle on his back during the paddle game.
Ella le dio un paletazo al niño por haber ensuciado la casa con su pintura.
She gave the child a paddle hit for having dirtied the house with his painting.