Druidian Priest: Excuse me, I'm trying to conduct a wedding here, which has nothing to do with love. Please be quiet.
Barf: I'm a Mawg; half man, half dog. I'm my own best friend.
Guy at diner: Water, my ass! Give this guy some Pepto Bismol!
Dark Helmet: Druish princess are often attracted to money and power, and I have both, and you know it.
President Skroob: Why didn't somebody tell me my ass was so big?
Lone Starr: What the hell was that noise?
Dot Matrix: That was my virgin-alarm. It's programmed to go off before you do!
Barf: It's not that we're afraid, far from it, it's just that we've got this thing about death... It's not us!
Answer: Its a reference to how the stars streak around the ships in "Star Wars". "Ludicrous speed" had to have a ludicrous color. It is also referencing 2001: A Space Odyssey, where this "tartan" effect occurs when Dave is in the pod towards the end of the film.
Grumpy Scot
Those answers are quite correct and possible, but how about this: Warp and weft are the two directions of yarn in weaving (of plaids and other things). It might be a very meta joke since plaid is at much higher level than warp. On the other hand, it's Mel Brooks. On the gripping hand, he was born in Brooklyn in the mid 20's and might have been exposed to the basics and vocabulary of the tailor at a young age.
Btw, it's also a clear reference to the sentence from Star Trek "They've gone to warp."