Hey you! Yeah, you holding this book, you with the face like a constipated greyhound. You're the sap in the family tree. Wouldn't know your langer from your thumb except for the nail. Word is if brains were taxed you'd be due a rebate.
But why stand there and be insulted? With the help of this invaluable collection of Irish insults, you'll be able to tell your boss that for someone without cows he produces an awful lot of bullshit. Or your husband he's as useful as a concrete currach. Or you might observe that your wife's arse is as wide as a Leitrim hurler's shot.