Worset line ever:
Kira: I wouldn't beleive him if he told me water was wet.
This one hurts just reading it!
At least it wasn't one of those space comparisons, where they say something like "You smell like a Bolian pig!", just to make it "sci fi".
Or when Kirk made "Katarian eggs". I guess the planet Kataria has only one sort of eggs. Next time, he was going to make Terran eggs. Err...