Teacher
1) n. a person who teaches, esp. in a school.
2) n. a person who is early when you are late and late when you are early.
3) n. a person who talks to themselves in front of a group of students.
4) n. a person who assigns homework only after everyone has packed up and is ready to leave.
5) n. a person who has mastered the skills of "monotonous lectures" and "gum-chewing detection."
6) n. a person who tells students to "do" their assignments, yet clearly states that they are to abstain from sex.