"Bodyfat levels" refers to the amount of fat present in a person's body. It indicates how much fat is stored in different areas of the body and is often used to understand overall health and fitness. Full definition
However, I did find that after two years using the Zone style diet for contest preparation I hit another plateau where I found it hard to get to the low bodyfat levels competitive bodybuilding requires. (cenvall.com)
High bodyfat levels are associated with lowered testosterone with a greater propensity for estrogen formation. (predatornutrition.com)
The rule of thumb is if you are comfortable with your current bodyfat level, then you need to bulk. (roughstrength.com)