Does the word "heavy" indicates one's "weight" or a "build?"

Native speaker’s answer
Rebecca
Yes, that's correct! We often use the word "light" or "heavy" to refer to something's weight or build. In this video, it's used to express that mandrills weigh the most out of all the monkey species. We can also use it in reference to people, and in fact it's often used as a euphemism to describe someone who may be considered "fat" or "overweight." Ex: I have a heavier build than most people my height and age. Ex: My golden retriever is the heaviest of my four dogs.