A male with a reputation of sleeping with the opposite sex as frequently as he requires. Normally the "slut jockey" isn't particularly fussy about his partner. As the name suggests, he is like a jockey, but instead of a jockey riding 5 horses on a single day (ie. at Aintree), this male may ride up to 5 females. He also stays in character by telling his partner how well they did, and may even give them a pat on the top of their head to show his appreciation of their efforts.
Damien: Look at that guy over there, those girls are
desperate to be fucked by him.
Daryll: Yeah, thats Nigel, he's fucking more girls a day than I get to talk to, he's a Slut Jockey.
Damien: Oh, I see. Lucky Bastard.