Milky onion is another name for a vagina. There are several layers of skin as that of an onion, and they are known to make many cry. A milky substance is secreted or found therein during times of sexual arousal and bacterial infection.

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.