When you respect someone so much that you can't date them.

How it differs from friendzone?
Respectzoned people may not necessarily be friends, could be someone who you look up to.

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.