When someone is in or too close to your personal space which is making you feel uncomfortable. Same as how the annoyed baseball pitcher feels when the batter is making they're job harder by taking up the area of the plate he is aiming for.
I was standing in the grocery store line, when the impatient person behind me was practically breathing down my neck to get out of there. "He/she" is "Crowding the plate".
referring to an almost unibrow; when one's eyebrows are going inward and almost touching
Aaron needs to get a wax, he's really been crowding the plate lately.