looking at someone, thinking about how fit they are and thinking about being with them, checking them out basicaly.

Scanning for potentials in a pub/club

The act of driving a vehicle while keeping one's head out of the sunroof.

Scoping is a online game term or leet speak, mainly used in First-Person Shooter games for killing someone with a rifle gun.

Scoping also is a sexual reference against someone. It's the new "Oi dude, CHECK that bitch out" (Replace check with Scope).
Use for when someone sees someone "attractive" in the distance and says sexist comments towards the person.

The act of scrubbing ones nipples with a toothbrush like appendage while toothpaste is applied generously to your liking

To stick ones head out of the window to "scope" out what others outside of your car are doing. Usually done by passengers.

Eavesdropping over a conversation