I'm claiming shine

It means you don't believe someone. You either think they are embellishing their abilities to look better or they are downright liars.

You're a rocket scientist yet working at McD's. I'm claiming shine.
Your resume says you have 10 degrees from Harvard and 4 from Oxford. I'm claiming shine.
He says he earns a million dollars a year and only lives in Compton to be close to his family. I'm claiming shine.