The term 'Left Bank Chums' refers to a group of French writers and artists who were based in Paris during the 1920s. The group was made up of authors, poets, painters, and other creative individuals who were known as the 'AMIS' (Friends). They were known for their avant-garde style and their influence on the artistic and literary movements of the time. The group included such famous figures as Ernest Hemingway, F. Scott Fitzgerald, Gertrude Stein, and Pablo Picasso.