From Merriam-Webster's Word of the Day email:
sophomoric \sahf-MOR-ik\ adjective
*1 : conceited and overconfident of knowledge but poorly informed and immature
2 : of, relating to, or characteristic of a sophomore
The class presentations were surprisingly thorough and interesting--not at all the sophomoric commentaries I had expected.
Did you know?
Sophomores get a bad rap. A lot of people seem to think they're foolish (no matter what they do), when they know they're pretty wise. The history of the words "sophomore" and "sophomoric," which developed from "sophomore," proves that it has always been tough to be a sophomore. Those words are believed to come from a combination of the Greek terms "sophos" (meaning "wise") and "moros" (meaning "foolish"). But sophomores can take comfort in the fact that some very impressive words, including "philosopher" and "sophisticated," are also related to "sophos."
*Indicates the sense illustrated in the example sentence.