(adj) a cross between "ghetto" and "retro". Used to describe something both old and of ghetto quality. Often consists of large amounts of duct/masking tape. Rust, tears, rot, and/or ancient stains abound. Not cool enough to be "vintage".
Big Ned: "Duude, did you see that hobo's cardboard box? That thing's ghetro."
Lil' Ned: "Yeah, well, yo' momma is ghetro."
Big Ned: "YO' momma!"
Hobo: *picks up box and some change-of-address forms*