babe in the woods

Etymology
From the ballad "The Children in the Wood".

Noun

 * 1)  A person who is innocent, naive, inexperienced, or helpless, especially with respect to an unfamiliar situation or environment.
 * 2) * 2008, Jake Niall, "‘Weakest link’ no more, Harry shows he's tailor-made," The Age (Australia), 8 Sep. (retrieved 23 May 2009):
 * Taylor is aware of the perception that he is the innocent, exploitable babe in the woods of the Geelong defence.
 * Taylor is aware of the perception that he is the innocent, exploitable babe in the woods of the Geelong defence.

Synonyms

 * See also Thesaurus:naive