The term "GLOC" stands for "G-induced Loss of Consciousness" and refers to the loss of consciousness that can occur due to excessive gravitational forces on the human body. Some synonyms for GLOC might include "blackout," "faint," "pass out," "lose consciousness," "collapsing," and "swoon." These terms all describe the same physical phenomenon but use slightly different language to express it. They are important terms to know for anyone involved in high-speed maneuvers such as pilots and race car drivers, as they can help them recognize and respond to the symptoms of GLOC in themselves or others.