Define High School Shop Teacher Meaning

By far the most power person in any high school. Who does the principal go to when he can't solve a problem? The school shop teacher, that's who.
Often seen driving the bitchin'est car (or Harley) in the school parking lot, and the only teacher who gains more respect from the students, the more crazy and weird he acts. In fact it's a job prerequisite to say and do things that make the students say, "what the fuck did he just say/do?".
The power of the shop teacher even extends outside of school and into the community as he conducts his normal activities. For example, parking his vehicle anywhere, anytime, is always allowed as long as the, "It's OK, I'm a shop teacher!" sign is hanging in his windshield.