Definition of bulk up

The phrase "bulk up" is often used to refer to gaining muscle and increasing body size. The origins of this term can be traced back to the mid-1960s, when bodybuilding culture began to gain popularity in the United States. The term "bulk" itself is derived from the word "bulk cargo," which refers to large quantities of goods shipped in bulk form. In the bodybuilding community, the term "bulk" was adopted to describe the process of consuming large amounts of food to build muscle mass. In bodybuilding, the goal is to increase muscle size while reducing body fat. This is accomplished through a combination of weightlifting and a high-calorie diet. The phrase "bulk up" was coined to describe the process of consuming a large volume of food in order to gain weight and build muscle. Over time, the term "bulk up" has become a popular fitness slang, commonly used both in and out of the gym. It has also been adopted by the mainstream media and is often used in fitness ads and articles to describe the process of building muscle mass. In summary, "bulk up" is a term that originated in the bodybuilding community in the 1960s and is now widely used in the fitness industry to describe the process of consuming large amounts of food to gain muscle mass and increase overall body size.