However, in retrospect it may be a good thing I didn't since the derailleur was the only thing that kept the rear wheel from ejecting completely. - Curlicues: The End of Straight-Ahead Cycling?
The front derailleur, which is shaped like the blade of a vegetable peeler, guides the chain between the gears attached to the pedals. - BusinessWeek.com --
Each appears to be different in its own way from the usual "derailleur", but who am I to judge one's special love for vowels? - BSNYC Road Dairy: Westward Meh
But I believe the "derailleur" double entendre is "Did you rail her" as in ... well, bang/shag/fill in your fave sexual euphemism here. - Epic-curious: Riding Long and Hard
It can be quite intimidating for the new cyclist to hear the many complicated questions asked at a bike shop using unfamiliar words like "crank set", "derailleur", and "drop tube". - Archive 2009-09-01