Irish word for rickety, unsteady, badly made. It wouldn't generally be considered slang, is used by young and old alike.
Don't sit on that chair, it's a bit bockedy.
In poor physical condition, bumpy, rough, or falling to pieces.
My car nearly fell apart going over that bockedy old boreen (road).
We took Seamus's bockedy old car to the beach. I don't know why he won't fix the suspension.