'Fatted' in the Bible

Again he sent other bondmen, saying, Say to the persons invited, Behold, I have prepared my dinner; my oxen and my fatted beasts are killed, and all things ready; come to the wedding feast.

and bring the fatted calf and kill it, and let us eat and make merry:

And he said to him, Thy brother is come, and thy father has killed the fatted calf because he has received him safe and well.

but when this thy son, who has devoured thy substance with harlots, is come, thou hast killed for him the fatted calf.