corn ball

[corn ball] {n.}, {slang}, {informal} 1. A superficially sentimental movie or musical in which the word "love" is mentioned too often; a theatrical performance that is trivially sentimental.

That movie last night was a corn ball.

2. A person who behaves in a superficially sentimental manner or likes performances portraying such behavior.

Suzie can't stand Joe; she thinks he's a corn ball.