When you quickly masterbate, trying to finish in a short amount of time. Quickly trying to squeeze one out at work without anyone knowing.
In the movie 'The Secretary' James Spader ferociously beats off behind his secretary as one of his clients, who has an appointment, waits to see him.
I'm skipping lunch and "Beating James Spader". To hell with the meeting I'm "Beating James Spader" today.