Meaning of "Get Serious"

the practice of strengthening and enlarging the muscles of the body through exercise.

bod·y·build·ing

bŏd′ē-bĭl′dĭng
bod·y·build·ing  (bŏd′ē-bĭl′dĭng)
n.
The process of developing the musculature of the body through specific types of diet and physical exercise, such as weightlifting, especially for competitive exhibition.

bod′y·build′er n.

bodybuilding

ˈbɒdɪˌbɪldɪŋ
bodybuilding (ˈbɒdɪˌbɪldɪŋ)
n
(Weightlifting) the practice of performing regular exercises designed to make the muscles of the body conspicuous

bod′y•build`ing

bod′y•build`ing or bod′y-build`ing, n.
the developing of muscles and physique through exercise, weight training, etc.
[1900–05]
bod′y•build`er, bod′y-build`er, n.