Question: what does it mean when someone wants to jump you?
Answer: "Jump" is just a way of saying "have sex." When a guy thinks a girl wants him to talk dirty to her, he may say something like "I'm going to jump your bones" which, again, means grab you and have sex with you. There are many slang words for "jump" such as "hump", "lay", "bed", "get in your pants", "screw", etc.