The term 'Be a Nag' can be broken down into four words, each of which is represented by a crossword solution. The first word is 'HARP, ' which is a four-letter word meaning to criticize or scold persistently. The second word is 'CARP, ' which is also a four-letter word meaning to find fault or complain constantly. The third word is 'PESTER, ' which is a six-letter word meaning to bother or annoy persistently. Finally, the fourth word is 'RIDE, ' which is a four-letter word meaning to scold or reprimand someone. Together, these four words form the phrase 'Be a Nag, ' which means to constantly criticize, complain, bother, or reprimand someone.