I've known her since she was 'a babe in arms'. [=a baby who is carried in the arms of an adult; an infant]
When I began my political career, I was a mere 'babe in the woods'.
Hey 'babe', how've you been?
(..) Oh, yes. The woman in the picture is me. She's a goddamned liar ! Some nutcase seeking money or publicity ! God only knows why ! Like that Russian babe, Anaesthesia ! They're inbound ! Rose DeWitt Bukater died on Titanic when she was . Right. lf she'd lived, she'd be over by now. (..)1997 Titanic