sophomoric
/sɒfˈɒmɒrɪk/ SOF-uh-MOR-ik
Definitions
1. adjective
lacking maturity or perceptiveness; immaturely simplistic or naive
“The film’s sophomoric humor and shallow characters fell flat with critics.”
2. noun
a quality or characteristic of being immature or lacking in maturity
“The sophomoric attitude of the younger generation has become a concern for many older adults.”