Thrasymachus (Greek: Θρασύμαχος; fl. 4th century BCE) of Corinth, was a philosopher of the Megarian school. Little is known about him except that he was colleague and friend of Ichthyas,^[1] and he had presumably been taught by Euclid of Megara, the founder of the school. He was said to have been the teacher of Stilpo.^[1]