The term 'TRICKED YOU!' can be broken down into three words: NOT (3 letters), GOTCHA (6 letters), and IGOTCHA (7 letters). The phrase 'not' implies that something was not done, while 'gotcha' and 'igotcha' are slang terms used to indicate that someone has been tricked or fooled. Together, these three words form the phrase 'TRICKED YOU!', which is used to express surprise or amusement when someone has been tricked or fooled.