when a female masturbates, or a man masturbates a female. the motion of the two fingers resembles the dj scratching a record.
Me: Last night my girl and I got really worked up at the movies.
Friend: Oh yeah bro? did she hook you up in the theatre?
Me: Yeah bro, she was jerking me and I told her I was going to "scratch your record", right there in the back row, she was down with it so I un buttoned her jeans and started playing.
Friend: that's awesome bro.
Me: yeah. I love pretending im a DJ.