When you stare at
someone, or
someone stares or spies on you repeatedly, either checking you out or in a disapproving
way.
It can be used to describe the culprit and also what they are doing.
katy: I
think we're being cocknosed.
Anna: Yeah i
know, it's that cocknose over there, could he be any more cocknosey!
Katy: I
know, cocknosers really get my goat.