Can also be exressed as Omne animal triste post coitum
, which is how the young novice Adso
describes his feelings after being seduced
by the beautiful peasant girl in the novel The Name of the Rose
by Umberto Eco
I laughed out loud when I read this part of the book and then showed it to a friend who is fluid in latin. He remarded that the sentence sounded wrong but that it could possibly be some kind of vulgar latin.