Wiktionary
unacademic
a. Not academic.
Usage examples of "unacademic".
Manfred was already whirling Sarah around the floor with unacademic vigor.
The casting and direction of the college play, to which he had looked forward as an orgy of unacademic art and a much better ground than classrooms for getting thick with the pretty girls, proved, entirely on account of Peony, to be an embarrassing game of hide and seek.
As for what may be called unacademic literature, there were not many essays in that art.