The phrase "gat on soapbox" refers to an individual who speaks his or her mind in a loud, passionate, and often controversial manner. Some antonyms for this phrase include remaining silent, avoiding confrontation, shying away from conflict or disagreement, and practicing diplomacy. These individuals may choose to express their opinions in a more subtle or passive way, such as through writing or voting, rather than making a public display of their beliefs. Other antonyms for "gat on soapbox" could include being meek, timid, or compromising, opting to blend into the background rather than stand out and create a stir.