mid-14c., "throat," from Old French gorge "throat; a narrow passage" (12c.), from Late Latin gurges "gullet, throat, jaws," also "gulf, whirlpool," which probably is related to Latin gurgulio "gullet, windpipe," from a reduplicated form of PIE root *gwora- "food, devouring." Transferred sense of "deep, narrow valley" was in Old French. From 1520s as "what has been swallowed," hence in figurative phrases indicating nauseating disgust.
c. 1300, "eat greedily, swallow by gulps," from Old French gorgier "to swallow" (13c.), from gorge "throat" (see gorge (n.)). Transitive sense from late 15c. Related: Gorged; gorging.