sophomoric

/ˌsɑfəˈmɔrɪk/
adjective
  1. Having or showing a lack of maturity; childish or silly in a way that suggests someone who is overconfident but not very wise.
    • She regretted her sophomoric behavior at the party, realizing she had acted like a teenager.
    • The debate turned sophomoric when the candidates started insulting each other instead of discussing policy.
    • His sophomoric jokes about the teacher made everyone roll their eyes.
What does "sophomoric" mean? | whatsthatwordmean | whatsthatwordmean