A combination of the words "ghetto" and "metro". Meaning, "the metro of the ghetto."
1) It is a term used to classify people who live in Metro Detroit. It isn't dope enough to be considered the ghetto, so its Ghetro.
2) Also used to describe the people living in the Ghetro, mainly white people.
1) Guy 1: "Hey man, have you been down to Livonia lately?"
Guy 2:" No way dude, that place is too ghetro for me."
2) "That kid is so ghetro, he wears his pants below his waist and has a C+ in geometry."