preposterous

Contrary to nature, reason, or common sense; absurd. synonym: foolish.

Having that last which ought to be first; reversed in order or arrangement; inverted.

Contrary to nature, reason, or common sense; irrational; glaringly absurd; nonsensical.

Foolish; ridiculous; stupid; absurd.

Synonyms and Silly, Foolish, etc. (see absurd), monstrous, crazy, mad, wild, ludicrous. See foolish.

Having that first which ought to be last; inverted in order.

Contrary to nature or reason; not adapted to the end; utterly and glaringly foolish; unreasonably absurd; perverted.

Absurd, or contrary to common sense.

incongruous;inviting ridicule