c'est le monde à l'envers

Etymology
lit. 'that's the world turned upside down'.

Phrase

 * 1)  the world's turned upside down
 * 2) it's crazy; it's illogical; it's backward; it doesn't make any sense
 * 3) it's the tail wagging the dog
 * 4) that's the pot calling the kettle black
 * 1) that's the pot calling the kettle black

Usage notes

 * Can be used in a variety of situations, with various contextual meanings.