To do 'The Dirty Guinness' one must down one's pint of Guinness then continue to thrustsaid empty pint glass into ones face, shattering it in the process.
Paddy O'Halloran: I can't make it into work today boss.
Boss: Why might that be Paddy?
Paddy O'Halloran: I only went and did The Dirty Guinness a few times last night, it was Finlay's stag do!
Boss: Good lad Paddy, I'll be seeing you tomorrow then.
n. software that is no longer sold or supported by the original publisher / developer, often found as free downloads on the internet because it cannot be obtained elsewhere. Not legal, but often seen as morally acceptable because the company that made it is no longer selling the title, nor releasing it as freeware, therefore abandonware is "keeping the gamealive", so to speak.
Doom II is not abandonware because idstill sells it, while The Incredible Machine is not sold, therefore is abandonware.