Quantum materiae materietur marmota monax si marmota monax materiam possit materiari?
- How much wood would a woodchuck chuck if a woodchuck could chuck wood?


I never heard that one before! Very clever!

(From Latin for All Occasions, by Henry Beard) -- my favorite:

Cum catapultae proscriptae erunt tum soli proscripti catapultas habebunt.
When catapults are outlawed, only outlaws will have catapults.