In slang, “girthy” typically refers to something that is thick or wide, often used in a humorous or suggestive context. It is commonly associated with descriptions of physical attributes, particularly in relation to body parts like the penis. The term can also be used more generally to describe anything that has a substantial width or bulk, such as a large tree trunk or a thick book. The connotation often carries a playful or exaggerated tone, depending on the context in which it is used.