Dumbbell is a synonym of musclebrain.
As nouns the difference between dumbbell and musclebrain
is that dumbbell is (weightlifting) a weight consisting of two disks or spheres attached to a short bar; used for exercise and weight training while musclebrain is (us) a person who actively participates in physical sports, possibly highly skilled in sports, but does not do well in academic activities, like math and science.
dumbbell
English
Noun
(
en noun)
(weightlifting) A weight consisting of two disks or spheres attached to a short bar; used for exercise and weight training
(pejorative) A stupid person
Derived terms
* dumbbell curve
See also
* barbell
* kettlebell
musclebrain
English
Noun
(
en noun)
(US) A person who actively participates in physical sports, possibly highly skilled in sports, but does not do well in academic activities, like math and science
(US, slang, pejorative) A large, strong, but inept, bumbling, buffoonish or unintelligent man
Synonyms
* (participant in physical sports) athlete
* (idiot) bruiser, dumbbell, moron, buffoon, dimwit, pinhead, meathead, birdbrain, peabrain, goon, dummy, dipstick, idiot