Sir John Falstaff is a renowned literary character created by William Shakespeare. In his works, Sir John Falstaff shows elements of cunning, wit, and a love for indulgence. In Shakespeare's works, there are several synonyms attributed to this fascinating character. Some of the most popular synonyms for Sir John Falstaff include old Jack, fat Jack, and John of Lancaster. Other synonyms used for the character include Sir John Oldcastle and Sir John Fastolf. Sir John Falstaff's character is known for his penchant for laughter, drinking, and jest, and continues to be a well-loved character in literature and theater circles worldwide.