"Throwing in the towel" is a common phrase used to describe giving up or surrendering. However, there are many other synonyms for this expression. Some of the common phrases include giving up, surrendering, admitting defeat, waving the white flag, bowing out, caving in, relinquishing, abandoning ship, and calling it quits. Additionally, some idioms that have similar meanings include "throwing in the sponge," "throwing in the towel," "throwing up one's hands," "throwing up the sponge," and "hanging up the gloves." Whether you are quitting a job, ending a relationship, or giving up a dream, there is always a synonym to describe the act of surrendering.