Wet behind the ears

The phrase "wet behind the ears" is an idiom used to describe someone who is inexperienced or naive, often in a particular field or situation. It suggests that the person is still in the early stages of learning and lacks the wisdom or knowledge that comes with more experience. The phrase originates from the idea that a newborn animal, such as a lamb, has wet, moist fur behind its ears prior to fully drying out and becoming more knowledgeable about its surroundings.