“If a prequel to Shallow Hal were ever made, when the actor was young and immature, it could be called Callow Hal.”
Callow
Definition (adjective): immature and inexperienced. “No longer a callow youth, he is now older and wiser.” “High school students are often hormonal and callow.”
Pronunciation: kal-oh
About the Word:
From calu, a word that meant “bald” in Middle English and Old English as in a bald or unfeathered young bird.