euphemism: to have a lie-in or nap, and communicate this in such a manner to maintain looking professional.

to sleep, or laze when you should be busy, and to make yourself sound busy to management

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.