1. To jerk off, wack off and or wack your bag.
2. To cum, jizz or nut on or about somthing.
1. The other day i was jaying at the computer and my roommate walked in.
2. I was fuckin her from behind and decided to jay all over her back.
3. I was fuckin that chick and her pussy smelt so bad that i lost my hard and couldnt jay.