When a person starts to slowly blink - they become a slinker.
Sometimes may be used in a derogatory sence when a person sleeps too much.
The slinker is prone to hovering, staring, and awkward flirting, yet will never force a girl into hooking up. When spurned by a prospect, which is often, the slinker will simply slink off into a corner to sulk, rather than increasing his creeper agenda--that is, until he finds a new prospect. Although generally doomed to a series of epic fails, the slinker occasionally scores big.
A slinker, with intensive therapy, may become a normal human being, while creepers are beyond all hope.