I went to a British forum, and found the following:
“Scoff” is a verb meaning “eat”. It carries a connotation of being somehow “cheeky”, as if you are eating something you are not entitled to.
Scoff is a UK military slang term for food rations as in, ‘Have you eaten your scoff yet?’
Furthermore I’m sure I’ve heard ‘scoff’ being used as a synonym for lunch (or a sandwich, or similar) in the north of England, almost certainly by men who might be described as working class. This recollection goes back a while.
http://boards.straightdope.com/sdmb/showthread.php?t=545329
I think they forgot the ‘r.’
You can scoff at a dog scarfing down food.
Of course, I can warsh things instead of washing them, so maybe it’s just my Midwestern twang.