Fasting and abstinence in the Catholic Church
The Catholic Church observes the disciplines of fasting and abstinence (from meat) at various times each year. For Catholics, fasting is the reduction of one's intake of food, while abstinence refers to refraining from something that is good, and not inherently sinful, such as meat.
Source: Wikipedia — Fasting and abstinence in the Catholic Church (CC BY-SA 4.0)