Yeah, I spent about 20 years in a dorm room. It took me a while to graduate.

The line is a self-deprecating joke built on the contrast between the expected brevity of dorm life (a few undergraduate years) and an exaggerated, prolonged stay. It frames “graduation” not as a simple credential but as a delayed milestone, implying either extended schooling, repeated starts, or a slow maturation process. As a quip, it can function to humanize the speaker—presenting him as someone who took an unconventional path, learned slowly, or lingered in a student-like phase longer than planned. The humor also lightly critiques arrested development: living in a “dorm room” for decades suggests postponing adult responsibilities while remaining in an institutional, youthful environment.