An expression of surprise is a phrase or sound used to express shock, amazement, or disbelief. Common expressions of surprise include 'GEE' (3 letters), 'AH' (2 letters), 'Oh' (2 letters), 'Hah' (3 letters), 'Oho' (3 letters), 'Egads' (5 letters), 'Zowie' (5 letters), 'HEAVENS' (7 letters), and 'Holymoly' (8 letters). These expressions are often used in informal conversations to show surprise or disbelief at something that has been said or done.