A fork of Rural Dictionary
(slang)a WWII Royal Airforce aircraft maintenance worker.
Possibly derived from a mispronounciation of the word "aircraft "(erkraft) or maybe even "electrician "(erktrician)as spoken by those working class types from London.The term was originally used by RAF officers, who were poking fun at the lower orders, but ended up being adopted by the objects of their mockery as a self description of their jobs.
My altimeter's gone for a Burton - can you get an erk to take a look at it?