Shoulder Slut
An individual, usually a girl, who at music festivals rides up on guy's shoulders extensively. They will move from guy to guy, quickly proceeding to another when the current one tires from carrying their weight, with little or no sympathy or emotional attachment towards the former. They are using the males unapologetically for a good vantage point.
That girl, she is such a shoulder slut! She just moved from Larry to Paul to that guy in the black tank top without even asking their names!