1.
muscular; well-built; having a muscular build
Describes a body type characterized by well-developed muscles and low body fat. Combines 筋肉 (muscle) with 質 (quality/nature), literally meaning "of a muscular nature."
Usage
筋肉質 is a na-adjective describing a body type with well-defined muscles. It is neutral and descriptive, without the exaggerated connotations that "macho" or "buff" might carry in English.
Common patterns
Similar words
マッチョ is a loanword from English/Spanish meaning "macho" or "muscular," often used casually and sometimes humorously. 筋肉質 is more neutral and clinical. がっしりした describes a sturdy, solidly built body but does not specifically emphasize muscles.