TV
He’s looking so geeky he couldn’t even get into a science-fiction convention.
— Ace Rimmer • Red Dwarf

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
This is an insult built on an exaggeration. Someone looks so geeky that even a gathering made for science-fiction fans would turn them away. The joke works because it flips expectations: a convention should be the most welcoming place for geeks, yet this person somehow fails the test.
Context reviewed