Swacking Cuckoo

Long before accurate map-making produced a need for the standardisation of place-name spelling, people tended to write and thus spell many names phonetically, or as they heard them being spoken. It was a problem that existed until only a very few generations ago, for a facsimilie of a 19th century registration document shows that a London official, perhaps writing down a place-name he had never heard of until the person in front of him spoke it, resorted to the spelling Scheringham, for Sheringham. He was not alone. A place-name directory on my bookshelf suggests that another nameless clerk went for a very similar spelling as long ago as AD1242.
That same directory - the work of Eilert Ekwall, who interpreted the name Sheringham as meaning 'the place of Scira's people' - also lists other versions: Silingeham (in the Domesday Book), Siringeham (in 1174), and even Schyringham (1291). In fact, things do not really seem to settle down until the 18th century, when Sherringham was firmly in vogue. Indeed, Faden's map of Norfolk (1797), Bryant's map of Norfolk (1826), White's Norfolk directory (1845), and the revised one-inch Ordnance Survey map (1885), all proudly trumpet the double-R version.
But what are we to make of Swacking Cuckoo? The name, that is, not the spelling. I first came across a reference to this place-name oddity some thirty years ago in an ancient Norfolk gazeteer then gathering dust in the EDP's newsroom.
Swacking Cuckoo, it said, consisted of 'a few houses' and confidently placed the location close to the railway cutting and bridge where the Cromer-to-Norwich line crosses the Cromer-to-Holt main road. A subsequent item about it in the EDP produced a negative, or rather nil, readership reply, suggesting the name might have slipped from public conciousness at that time. Indeed, one of my large-scale maps merely marks the location, somewhat more soberly, as Cromer Plantation. The same map, incidentally, also labels a small woody area on the north side of the Cromer Curve rail line as Jacket De Hole - explain that if you will!
But public loss and forgetfulness do not seem to be in vogue today. A quick check on Google unearths the fact that several properties, mainly alongside the Holt-Cromer road, now use Swacking Cuckoo as part of their postal addresss, suggesting that at least the local postie knows where it is.
So what does Swacking Cuckoo mean? Does it mean anything?
A first thought was that it might once have been a field name. But an 1826 directory says the road from Cromer to Aylmerton - or the stretch by Cromer Hall - was then called Cuckoo Lane. However, my dictionary suggests that if you are 'swacked' then you could well be in a state of alcoholic intoxication. So was there a pub named the Cuckoo in the area? Eilert Ekwall, the great place-name expert, is silent on the matter.