von gestern

Etymology
lit. 'of/from yesterday'.

Adjective

 * 1)  outdated
 * 2)  born yesterday
 * 1)  born yesterday

Usage notes

 * The two senses are contradictory. Sense 1 is based on yesterday meaning “of the past” (and hence “obsolete”), whereas sense 2 is based on the same word meaning “recent” (and hence “inexperienced”). This may lead to some confusion, though rarely to actual misunderstandings.