Meaning: Cotgrave, definining Philogrobolizé du cerveau, or philogrobolized in the brain:
intoxicated, astonied, bedunced, at his wits end.Usefulness: 1 (Besides that use, there's also the one suggested in The Horologicon: "It conveys a hangover, without ever having to admit that you've been drinking.")
Logofascination: 1 (Sir Thomas brought it into English, and has the only citation in the OED, but Rabelais might've formed this. It's related to metagrobolize - tomorrow's word - and the OED suggests that the philo- is the traditional compound, meaning love, but I suspect that it is meant to suggest philosophy or philosophising; their brains are overcome by too much thinking. I must admit to also being rather fond of the phrase philogrobolized in their brains.)
In the wild: no; the only other uses I've found are in other translations of Rabelais, or, as mentioned, The Horologicon.