A person who digs into your past to find information to negatively affect you today. This person could also be called a snitch, a narc, or tattletail
Karen is such a narchaeologist. She told my girlfriend about a Facebook post from 5 years ago.
A small turd that floats on the surface of the toilet water.
Dammit who didn't flush the toilet well enough?! There is a damn putnubby still floating in here!