A guy who gets a full intercourse with every single girl he meets at work, in the street or in a night club. In other words, he gets a full home run.
Luke:"Hey Fredo, did you hear what Peter did last night?"
Fredo:"No, tell me!"
Luke:"He went to a posh party downtown and met a girl named River. After ten minutes they both left the party and went to a motel".
Fredo:"Wow, he has scored another time! He is a score guy!".