DUMBBELL

dumbbell

(noun) an exercising weight; two spheres connected by a short bar that serves as a handle

dumbbell, dummy, dope, boob, booby, pinhead

(noun) an ignorant or foolish person

Source: WordNet® 3.1

Etymology

Noun

dumbbell (plural dumbbells)

A weight training implement consisting of a short bar with weight counterpoised on each end.

(pejorative) A stupid person.

Source: Wiktionary

Dumb"-bell`, n.

Definition: A weight, consisting of two spheres or spheroids, connected by a short bar for a handle; used (often in pairs) for gymnastic exercise.

Source: Webster’s Unabridged Dictionary 1913 Edition