Pronounced like "lingerie" except with the first syllable replaced by "man": Men's colorful bicycling wear i.e. the lycra-clad, sponsor-adorned, AMATEUR bicyclists that look like they've spent a lot of time prissying themselves up in front of the mirror to look good for their "straight" bicycling partners (more like bi-partners). Typically goes with an obnoxious riding style like hogging the road in a little pack (fudge anyone?) when they could use the damn bike-lane less than 10 feet away AND be safer while they're doing it.
"Hey, look at that clown! He's hogging the road, riding in the WRONG gear, while trying to look cool, but he still looks like he just took his bike out of the closet because he's prancing it up in the mangerie his bi-partner bought him for his birthday!"
"That's right dude; doesn't he know there's a bike lane 3 feet away? The reason he can't ride faster is because he's afraid to sweat in his pretty mangerie!"
The male counterpart of lingerie, any article of men's underwear or loungewear which is somehow fancier or deliberately sexier than strictly necessary for basic, utilitarian undergarments.
I was surprised by just how much the ladies seem to love my mangerie, like that sheer-pouched thong, this silk robe, and especially my French-back yoke-front drawers, which are the only skivvies I've ever had literally ripped from my body by an exceedingly aroused woman -- which in retrospect was well worth the $25 it cost me to replace them!