Don't get too gay in Botany Bay unless you be well hung; unless you be well hung me boys, and after that Jim Jones, way up upon the gallows high, the crows will pick your bones...

Otherwise:

Sweeney the thin-groined it is,
in the middle of the yew...

Is that Flann O'Brien's translation? Alas I can't lay my hands on either At Swim-Two-Birds OR Sweeney Astray (Seamus Heaney). Meanwhile making do with Buile Suibhne. It's a sair fecht, as Oor Wullie would say.