'Agorina' means the 'big' boy. You usually use it as a slang for example : (a woman to a guy) ' Hey agorina where are you going, alone? '
or from a friend to a friend (guys both) : ' Come on re agorina , lets go now ' or ' So long re agorina, where you've lost? '
It is derived from the word 'agori' which means 'boy' .