What's (someone) playing at? informal question
Used to ask about what someone is doing because one is very angry and thinks that person's action is wrong.
What are you playing at going out with my girl? I thought you were my friend!
I can't understand why he decided to do it. What's he playing at?
To complain that something is unfair or illegal.
To intentionally and spitefully insult or show disrespect for someone
Said to someone who makes you feel frustrated or annoyed
Suddenly become crazy or very angry or lose control
To decide to believe someone‘s saying although they may not tell the truth
He said that he was late because he had an accident and I gave him the benefit of the doubt.