To joc on someone is to find them physically
attractive and to want to be physical with them. It is similar to crushing on someone, but this is less school girl and more like you want to
jump them.
When you joc on someone it means you really
dig them physically. This has nothing to do with personality.
Me: "
Hey Anna, is that dude still joccin on Emily?"
Anna: "Yeah, he totally gives her the look every
time she's around, I think I
may have even seen him lick his lips"
Almost every girl in the world right now is joccin on Taylor Lautner.