1. Strong and muscular: This is the more common meaning, often used to describe a man who is physically fit and attractive. For example: "He was a studly guy with a great physique."
2. Relating to studs or studding: This meaning is less common and refers to something that is related to the use of studs, which are metal pins used for fastening materials together. For example: "The studly construction of the house was very strong."
It's important to consider the context to understand the intended meaning of "studly." If it's used to describe a person, it's likely referring to their physical attractiveness. If it's used in a construction context, it's likely referring to something related to studs.