little hermaphrodites - According to the Oxford English Dictionary, "scrat" means hermaphrodite. If you combine that with the suffix "-ock", which the OED says is generally used as a diminutive, we can guess that the word scrattocks means little hermaphrodites - maybe midget herms even.
It seems the only good use for this word is arbitrary cursing. You could say it when you are suddenly angry like when you stub your toe or when you spill a drink. It's definitely an expletive.
"Awwww..... the usual .... went out with the lads last night and had eleventeen pints of Scruttock's "Old Dirigible", then a curry..... got any aspirin ?"
guy 1: dude, my scruttox itches like hell, what's your sisters number?
guy 2: What? why do you want my sister number?
guy 1: because she was licking my scruttox last night and I think she gave me something, I'm gonna tell that bitch off!