Incredibly difficult to define. Imagine someone you know with a content grin, doing something odd or content as well. Someone being sly, queer, content... once you see it, you'll never stop noticing it.

Adj. Something that is expected to have a long lifespan by virtue of having existed for a long time, based on the lindy effect, named for the New York restaurant Lindy's, coined by Albert Goldman and popularized by Nassim Taleb.

Sleer, (origin, english)

The word sleer defines a slow, unstoppable, yet often regrettable foreward movement.

A group of dykes and gay men who think they're above everyone in their own circle.
See also "flake".