It isn't a canonical term.

Just mix determinist beliefs, sloppy models, and a dangerous overestimation of one's own intelligence--then things are pretty much guaranteed to end the same way old Julien did.

I believe he's referring to the philosophy of Julien de La Mettrie, though I don't know enough about that subject to say more.

https://en.wikipedia.org/wiki/Julien_Offray_de_La_Mettrie#Ph...