The word "biceps" is a collective noun that refers to all sets of proximal muscles on the ventral side of the humerus bone in the arm. Socially, in Western societies, big or defined biceps have developed into a sign of masculinity.
The full scientific name for the muscle set is the "biceps brachii" region. It originates from the top of the supraglenoid muscle and the top of the coracoid process of the scapula. It serves to flex the elbow and supinate the forearm, as well as to weakly influence the flexibility of the bones in the shoulder.