I've always been partial to 'Meniscus' - "The curved upper surface of a nonturbulent liquid in a container that is concave if the liquid wets the container walls and convex if it does not."
Fantastic!
When it comes to great words New Yorkers win hands down with classics like "shmuck" (an unlucky, uncool person) or "shlameel" (the kinda guy that a shmuck would take pitty on).