The term PREZ AFTER BUBBA is referring to the 43rd President of the United States, George W. Bush, who served from 2001 to 2009. His nickname is 'Dubya, ' which is a five-letter word that fits the crossword solution. Dubya was the son of former President George H.W. Bush, who served from 1989 to 1993 and was commonly referred to as 'Bubba.' Therefore, the term PREZ AFTER BUBBA is referring to George W. Bush, whose nickname is 'Dubya.'