A term used by snowboarders/skiiers referring to the zippers at the ankles of your snowboard pants that zip up to make your pants tighter around your boots. Unzipped they make the pants appear baggier and therefore more "ghetto".
"Undo your ghetto flaps you look like a homo."
A ghetto flap is when ghetto-hood-star girls that are unusually plump wear very tight gangster jeans. This causes their excessive rolls to flop out over the top of their jeans. If there's enough extra meat hanging out, this is known as "Ghetto Flaps." A severe case is known as "Ghetto Sags."
Ghetto Flaps may be very attractive to those who like these kind of girls, and may be rather fun to play with.
1.) YO DAMN! MAMI GOT FINE ASSS GHETTO FLAPS!!!
2.) That bitch got ugly ass ghetto flaps. Those motha fuckas be saggin down to here knees...