In somebody’s face
Definition 1 of 2
Pro Tip 1/3Physical proximity
Usually means someone is being bothered or overwhelmed by how close another is to them. 
He got in my face during the argument, making me really uncomfortable.
Pro Tip 2/3Emotional charge
The phrase often indicates that someone is being emotionally intense or confrontational. 
She was all in my face about my mistake, making me feel worse.
Pro Tip 3/3Invading space
It's used to express a violation of someone's personal space or boundaries. 
The pushy salesman was right in my face, and I had to step back.