Corny

The internet slang term “corny” is used to describe something that is considered cheesy, awkward, or overly sentimental. It refers to something that lacks originality or is seen as overly sentimental, often in an insincere or cringeworthy way.

Examples:

That joke is so corny, it always makes me roll my eyes.
His pick-up lines are so corny, it’s hard to take him seriously.