In
Monty Python-dialect
French, this phrase means literally "Get the cow!" as an
imperative. It is heard in the magnificent work
The Holy Grail when the
Taunting French Knight snaps this order to his fellow knnnnigits within the castle. Moments later, with a resounding
mooooooooooooOOOOOOO! a large
cow (it appears to be a
Holstein) flies up over the castle walls, to the
consternation of
Arthur and his men. It was fired, no doubt, from a
cattlepult, probably one of the best they-didn't-actually-
say-it jokes ever filmed.
Note: Spuunbenda has informed me that it was a trebuchet, not a cattle-er, catapult. My mistake, and thanks for the note S!