avg joe is short for average joe. it just describes someone, telling you that there is nothing special about that person, that person is average, so he is an avg joe.
person 1: hey man i had the new joe erickson guy in my house today
person 2: The movie star?
person 1: no... he was just an avg joe
person 2: The movie star?
person 1: no... he was just an avg joe
by Jake Fletcher June 20, 2006