The term AGT can refer to several different things. The acronym AGT stands for 'AGENT' and can be used to refer to a representative, a deputy, a SPY, or a representative. A representative is someone who acts on behalf of another person or organization. A deputy is someone who is appointed to act in place of another person or organization. A SPY is someone who secretly collects information for a government or other organization. A representative is someone who is authorized to act on behalf of another person or organization.