cornball

Short definition from Wiktionary

Noun

1. 1
   A ball of popped corn stuck together with soft candy from molasses or sugar.
2. 2
   An unsophisticated person.
3. 3
   Something or someone excessively corny.
4. 4
   A corny person; an uncool, stupid, or lame person.

Adjective

1. 1
   Naive, corny.