@nicole4fox
maybe not an sentence, but something you'll probably encounter is "verlan", the art of saying words apmroximately in reverse, as a synonym.
it's mostly found in... "street french", for a lack of a better term.
for instance "meuf" (gal) being the verlan for "femme" (woman)
and yes, "verlan" itself is verlan for "à l'envers" (in reverse).