(horse-racing) Of a horse: frisky and energetic, seeming keen to race.

muscles in the body, meant collectively / the process of muscle formation or growth

present participle of muscle

plural of love muscle

(slang) genitals / (idiomatic) the heart

(anatomy) A triangular muscle on the human shoulder.

plural of deltoid muscle

(physiology) The continuous and passive partial contraction of the muscles, which helps maintain posture.

plural of muscle boy

Any of a variety of automobiles, especially American sedans from the 1960s and early 1970s, that are modified to look and perform like race cars and equipped with large, powerful V8 engines that allow for quick acceleration to high speeds; but still designed for travel on regular highways.