(colloquial) A person who spends an unusually large amount of time at a gym.

Clothing, specifically athletic wear, worn to a gym, fitness center or health club for the purpose of physical activity. / Clothing worn by students during physical education class at school.

(bodybuilding, slang) Steroids or other drugs taken to improve physical performance.

A type of relatively lightweight shorts with elastic waistbands designed for use in sports and physical activity, especially gym class. The terms basketball shorts and mesh shorts are used nearly synonymously with gym shorts in the United States, despite their different initial usage.

(colloquial, bodybuilding) A person who spends a large amount of time working out at a gym and who wants to improve his or her physique.

plural of gym rat

plural of gym bunny

(slang, derogatory) Large, aesthetic, well-developed muscles, especially ones that are believed to be overly large or impractical.

(UK) Large girls' underpants traditionally worn as shorts during school sports activities.

A square plank made from plastic or wood which is attached to four swivel casters at the corners, used in physical education.