Kick in the teeth noun phrase informal
Being treated badly and unfairly by someone, especially when you trust them and need their help
I trusted him with all my heart but in the end he betrayed me. It was a real kick in the teeth.
I tried my best to devote myself to this job but the company decided to fire me despite my efforts. It was a kick in the teeth.
A bad- tempered person
To be treated unfairly in a deal, resulting in a disadvantage or burden; to be treated unfairly in some way.
This idiom was originated by the English in the 18th century, related to the pain of being kicked.