A threat describing the act of licking somebody else's oreos before the original owners have the time to "twist it, lick it, dunk it" themselves.
As a result, when the original owner licks their oreo, they are savouring your sweet sweet saliva.
Works in the phrase "Don't make me pre-lick your oreos"
Guy1: Were you... dropped as a child?
Guy2: Hey shut up! Don't make me pre-lick your oreos!!