진부해요 · 진부했어요 · 진부한 (+noun)
trite, clichéd, stale
Example
영화 내용이 너무 진부해서 지루했어요.
The movie's plot was so clichéd that it was boring.
Word parts
진 old+부 rotten
Literally 'old and rotten'.
Good to know
진부하다 describes the content itself; 식상하다 means you're sick of seeing it.