The Royalist has been rather distracted of late by events in the Southern Hemisphere, however back home in the UK there's been a historic first - a state visit to the UK by the Irish president, Michael D Higgins, and the first minister of Northern Ireland, the former IRA commando Martin McGuinness.
McGuinness is widely believed to have a senior member of IRA staff when the Mullaghmore bombing which killed Prince Philip's uncle, Lord Mountbatten, was planned and executed in 1979.
An arse biscuit is usually an insult, it basically translates as your the piece of shit, hanging from someones arse hair, thats gone crusty like a biscuit! Usually a word to insult a man, as women dont tend to get arse hair!
Can be used either as an expletive when something is amiss, or, in response to someone else's complaining conversance to yourself instead of using the phrase "hard luck" or perhaps more accurately in this case, "tough sh*t".