This time I had to look up a derivation. I was sure "slumgullion" would be a corruption of an Irish or perhaps Indian word, but no. There is no derivation, which must mean that somebody just made it up. And, it originally referred to insipid drink, such as weak tea.

Just goes to show how strongly people felt about their tea.

As for "skink", it's either a kind of lizard which lives in warm, sandy regions or a verb meaning "to draw, pour out or serve." Either sense seems baffling.

Maybe somebody should inform Cullen that "Cullen" comes from the Gaelic for holly.