motarded adj. excessively stupid; in the military, enthusiastic to the point of stupidity. Editorial Note: Although there’s no shortage of jokes, puns, and misunderstandings about its similarity to “retarded,” a different “motarded” comes from motocross racing, in which a certain kind of motorbiking is known as a Super Motard, French for “super biker.” Andrew Trevitt has a good explanation of the sport in Sport Rider magazine. Motorbikes modified for professional racing but ridden on streets by amateurs are sometimes called “motarded.” Etymological Note: Perhaps from moron(ic), motivated, or more + retarded. (source: Double-Tongued Dictionary)
Further reading
A Francophone who’s feeling low might say so with J’ai le moral dans les chaussettes. The idiom avoir le moral dans les chaussettes means “to have morale in your socks.” This is part of a complete episode.
Related
I like this word, but I think it could be expanded to apply to all the motarded drivers on the road.