fall off the turnip truck

Verb

 * 1)  To be naive, uninformed, or unsophisticated, in the manner of a rustic person.

Usage notes

 * Often used in the past tense and preceded by "just."

Translations

 * Finnish: olla juntti
 * Greek: τρώω κουτόχορτο
 * Spanish: caerse del guindo, caerse del nido, caerse de un nido