wet behind the ears
Immature, inexperienced, and naïve: “Don't rely on his advice about girlfriends; he's still wet behind the ears.”
DON’T VACILLATE! VANQUISH THIS WORD OF THE DAY QUIZ!
Words nearby wet behind the ears
Idioms and Phrases with wet behind the ears
Also, not dry behind the ears. Immature, inexperienced, as in How can you take instructions from Tom? He's still wet behind the ears, or Jane's not dry behind the ears yet. This term alludes to the fact that the last place to dry in a newborn colt or calf is the indentation behind its ears. [Early 1900s]