Crocodile tears
Definition 1 of 1
Pro Tip 1/3Insincerity
Used when someone pretends to be upset or sorry, but they are not really feeling it. 
After breaking the vase, Joe's crocodile tears didn't convince his mom.
Pro Tip 2/3Manipulation
Sometimes used to manipulate others or a situation to the pretender's advantage. 
She cried crocodile tears when caught cheating, hoping to escape punishment.
Pro Tip 3/3Context Clues
Pay attention to context, as the phrase often indicates skepticism about someone's true emotions. 
The jury saw through his crocodile tears and found him guilty.