"Jeggings" are leggings that look like jeans. Some neologisms are cutesy and pointless — I’m looking at you, "meggings" [men’s leggings]! — but I think jeggings serves a purpose. It signifies that the leggings in question are styled differently than your standard simple, stretchy, undetailed elastic-waist tights.
A "quellazaire" is a cigarette holder, not a storage case, but a tube on which the cigarette is mounted. It’s an actual word, but I can’t find an authoritative reference online for it. I have no idea of the etymology either, but I’d love to find out.