Crocodile tears, or superficial sympathy, is a false, insincere display of emotion such as a hypocrite crying fake tears of grief.
The phrase is supposedly derived from an old legend that states that crocodiles cry while devouring their prey. Not sure who came up with that one. Maybe a crocodile?
Crocodiles do indeed have lachrymal glands and produce tears to lubricate their eyes like humans do. However, they don’t cry with emotion.
Especially not while they’re hungry and eating.