When a person rubs their index finger along their guch, then proceeds to form a hook with the index finger. The finger is then inserted into the mouth of an unsuspecting individual so as to simulate that person being hooked like a fish. A more sinister aproach to the fish hookmaneuver. This move is usually performed on a person that is being an asshole or just plain will not shut up.

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.