Any child who has grown up with a parent in the Extension Service, knows what MSU means, got excited when you turned 9 because you get to finally be a real 4-H'er, personally knows 10 or more Extension Agents- or has memorized who serves what county, tried to name every county and county seat in the state, and has played "Name That Noxious Weed" on many a road trip.

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.