Lots of questions about verlan in the last few hours. It is not my favorite way of expression but it can be surprising at times. The reflex is difficult to acquire I think. The topic didn't make it to the discussion page unfortunately so here is part of it.
Perhaps someone can add to it.
Le verlan= l' envers// French backwards
pourri => ripou
when the last letter is a silent "e", insist on it when pronuoncing before turning the syllables aroud:
femme=> femmeu=> meuff=> meuf
fête=> fêteu =>teuf
Sometimes it is not clear...
Voilà, I hope it helps. It is not easy!! There are several sources of info about verlan online.
Bonne soirée à toutes et à tous.