The term 'Chronic Nag' can be broken down into two words, 'SHREW' and 'MALCONTENT'. A SHREW is a small mammal that is known for its aggressive behavior and sharp teeth. It is also used to describe someone who is bad-tempered and scolds or nags others. MALCONTENT is an adjective that describes someone who is discontented or dissatisfied with their current situation. Therefore, the term 'Chronic Nag' can be used to describe someone who is constantly bad-tempered and discontented with their current situation, often nagging or scolding those around them.