in·ter·lop·er/ˈintərˌlōpər/
intruder: someone who intrudes on the privacy or property of another without permission
wordnetweb.princeton.edu/perl/webwn
When I was in year 7, I went to a school musical a few of my friends were peforming in. They invited me into the dressing room after the show. After a while, one of the teachers wanted me to leave and called me an antelope. I still wondered to this day why he called me that.
It was only when I stumbled across this word today that I realised what he actually said.
