A foreigner of undistinguishable ethnicity. Usually, with a seemingly generic foreign accent and tan coloered skin. Based on the character from That 70's Show with a changed spelling acronym for foreign exchange student.
"No I'm never gonna do it without the fez on
Oh no
No I'm never gonna do it without the fez on
Oh no
That's what I am
Please understand I wanna be your holy man" Steely Dan - The Fez