An Idiom/Expression A Day Throw Shade

An idiom is a word, group of words or phrase that has a figurative meaning that is not easily deduced form its literal meaning. 

Do you know anyone who keeps 'throwing shade'. Has anyone you know been 'throwing shade' recently? Throw shade means publicly criticize someone or express contempt for someone.

Hopefully my post didn't look like I was trying to throw shade or something.

Amina got really angry when she caught her friend throwing shade at her. 

To throw shade simply means you have said something shady to someone. To subtly issue insults or expressions of disapproval. Insults delivered when throwing shade should be subtle and not necessarily appear to be insulting at first. 

For example, if one of your friends has a new haircut you don't like you might say, "Look at your hair." This is not a direct appraisal of what you don't like about the haircut and is not even a negative comment, but it is not a positive comment, either. The idea it that it is a shady, or dishonest, comment.