Frant
(noun)
Measure.
The legal minimum distance between two trains on the District and Circle line of the London Underground. A frant, which must be not less than 122 chains (or 8 leagues) long, is not connected in any way with the adjective 'frantic' which comes to us by a completely different route (as indeed do the trains).
(nom commun)
pas encore traduit
revenez bientôt.
source : The Meaning of Liff