babe in arms
1. An infant. (Based on the fact that an infant is typically carried in an adult's arms). Let me see that precious babe in arms!
2. A person who is gullible, naïve, or lacks experience in a specific situation. Although Jane had always excelled in school, she felt like a babe in arms when she began attending college.
a babe in arms
mainly BRITISHIf you describe someone as a babe in arms, you mean that they are very young. The family have always cycled, and Chris has been going to races since he was a babe in arms. I first appeared on stage as a babe in arms, and my mother just assumed I would become an actor. Note: `Babe' is an old-fashioned word for a baby or small child.
a ˌbabe in ˈarms
(old-fashioned)
1 a very young baby not able to walk or crawl
2 a helpless, an inexperienced or an innocent person: He’s a babe in arms in financial matters.