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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.

the act of passing out in a loo, ideally in a public place, and waking up to find excrement and sick up the walls

The act of passing out in a pile of your own piss and vomit - often in toilter cubicles, but not location specific.