According to Adam Corolla it's high school with ash trays and a waste of time among other things.
Guy # 1:"Hey, where are you going to school?"
Guy # 2:"Just Junior College"
Guy # 1:"I'm sorry"
Junior College = High School: part 2
Bob: man, I go to a Junior College, I feel like I'm in High School: Part 2
Rob: I know man, but its soooo easy!!
Bob: yea, Junior College is easy!