"The Parting Glass" is a recent ripoff of the Scottish "Good night and joy be with you all", which (according to Walter Scott) is an eve-of-execution monologue.

The first song I can remember anybody singing was by my Glasgow-Irish grandma and it would be appropriate in a way... maybe I ought to specify it for my own funeral...

Oh, McTavish is dead and his brother don't know it,
His brother is dead and McTavish don't know it,
They're both of them dead in the very same bed,
And neither one knows that the other is dead.

(tune: The Irish Washerwoman)