knob knocking wanker
is an individual who passes time finding places to have a jerk in. He can go anywhere, at the mall, in the movies, at your grandma's funeral, anywhere. these are mostly kids who have recently discovered how to beat it off , 30 year old men who are still living in their parent's basement, anyone has the potential to be a Knob Knocking Wanker
Harry: Can you believe this? Chris is hitting it off in the disabled bathroom again
Peter: He's such a knob knocking wanker
Peter: He's such a knob knocking wanker