"He's a Rink"
At the time (60's) I didn't know what it meant, but it was the guys like Danny Zuko in Grease. Our school was full of them. Since then, I've heard it meant the guys who hung out at the roller skating rink. We called their girlfriends "sluts". I don't think it had the same derogatory meaning it has now, or those girls would have beat me black and blue.
Boy, I guess that really dates me doesn't it?