green acher

Originating 1970s from Tilbury Docks Essex, from the old timber ships (the timber was called "green" cargo and if you dropped a pack of it, you would have an aching back after you picked it up! - Knocking over of cargo/accident resulting in the picking up of somthing heavy.

Forklift driver knocks over a stack of pallets - "Bills just had a green acher!"