noun, masculine/lu.ʃe.bɛm/plural: louchébems
a form of slang originating from butchers in Paris and Lyon, involving changing the order of the letters of a word; butcher
“Pour pratiquer le louchébem, un peu de gymnastique intellectuelle est nécessaire.” — To practice louchébem, a bit of intellectual gymnastics is necessary.
From le boucher (“the butcher”), which becomes louchébem under this transformation.