scrotum streakin
When you're titty fucking a girl with small tits so hard that your scrotum is streaking up and down her chest.
Guy 1: Dude you'll never guess what I did with my girlfriend last night!!
Guy 2: Tell me man!!
Guy 1: I was totally scrotum streakin her all night long!
Guy 2: Tell me man!!
Guy 1: I was totally scrotum streakin her all night long!