corny
adjective /ˈkɔːni/
  /ˈkɔːrni/
 (comparative cornier, superlative corniest)
 (informal)- not original; used too often to be interesting or to sound sincere
- a corny joke/song
 - I know it sounds corny, but it really was love at first sight!
 - Opera’s blend of corny emotion with glamour and spectacle appeals to advertisers.
 - You sound like someone out of a corny film!
 
Oxford Collocations DictionaryCorny is used with these nouns:- joke
 
Word Origin1930s: from an earlier sense ‘rustic, appealing to country folk’.