Ungenerous behaviour is a term used to describe SELFISHNESS, which is defined as an excessive concern for oneself and one's own interests. It is characterized by a lack of consideration for others and a disregard for their needs or feelings. SELFISHNESS can manifest itself in various forms, such as hoarding resources, taking advantage of others, or refusing to share. It can also lead to a lack of empathy and a disregard for the well-being of others.