Why was the cat called Maher Shalal Hashbaz?

From the text:

There were so many now for every meal that we had to set the chairs diagonally around the dining room table. The cat loved this arrangement. Eusie had given him the Hebrew name Maher Shalal Hashbaz, meaning appropriately enough, “hastening to the spoils, hurrying to the prey.” With the chairs set so close, M. S. Hashbaz could circle the entire table on our shoulders, purring furiously, traveling round and round.