The idiom "rub something in someone's face" means to boast or remind someone of their mistake or failure in a way that is hurtful or humiliating. It is used when someone repeatedly mentions or reminds another person of something they did wrong or failed at, in a way that is intended to make them feel bad or embarrassed.
For example, if someone fails a test and their friend keeps reminding them of their failure in a teasing or mocking way, they are rubbing it in their face. Or if someone loses a competition and their opponent keeps reminding them of their defeat, they are also rubbing it in their face.
Using this idiom can be hurtful and insensitive, so it's important to be mindful of other people's feelings and avoid using it in a negative way.
• My colleague always brags about her salary, and it really rubs me in the face.
• Whenever I mention my struggles, my unsympathetic friend rubs her success in my face.
• The politician's opponent constantly rubbed his scandal in his face during the debate, causing him to lose the election.
• My neighbor keeps showing off her new car, and it's getting annoying - she keeps rubbing it in my face.
• After winning the championship, the rival team rubbed their victory in our face by celebrating loudly near our locker room.
• I accidentally spilled my friend's drink, and she rubbed it in my face all night.