Mauve with boredom

"The death agony of the metatext... is interminable."
    (Guess...)

Professor Igloo was interminable too, though he was not a mortal/immortal (mortal/immortal (under erasure (?))) metatext. The green aliens, to pursue another concatenation of signifiers for a moment, had gone mauve with boredom, trying every known method of termination. Finally, they hit upon ("literally") a Bowyers' Tinned Steak and Kidney Pie (note product placement). And they used it, despite Igloo's protestations, in the negative. They then poured off to the factory to load up with a few tons before using them to destroy civilization as we know it.