What the hell does that mean? "Guillotinally" isn't even a word.
“Via guillotine”, I would think.
He was just being cute after his previous litany of other adverbs (and pseudo-adverb): “unofficially, exploratorially, ethnologically, racially, admixturally, miscegenationally, confidentially and, above all, budgetarily.”
It will be your head?