This is usually stated when a college
professor is so easy that all you have to do is literally have your
"ass in seat" to achieve an A grade for the class. College
students generally know which professors
are AIS by word
of mouth rumors.
Chandler: Hey Joey, take a community
college course with Professor Ross, and you are guaranteed an A grade for the class
as long as you attend class
Joey: Are you saying Ross is an AIS professor?
Chandler: I am totally saying he's an AIS professor.