innocent as a lamb

(as) innocent as a lamb

1. Blameless or faultless. I swear, I didn't pull the fire alarm—I'm innocent as a lamb!2. Unsophisticated, inexperienced, and/or gullible. This is her first job—she's as innocent as a lamb.See also: innocent, lamb

*innocent as a lamb

 and *innocent as a newborn babe 1. guiltless. (*Also: as ~.) "Hey! You can't throw me in jail," cried the robber. "I'm innocent as a lamb." 2. naive; inexperienced. (*Also: as ~.) She's eighteen years old, but innocent as a newborn babe.See also: innocent, lamb