Thinker
The process by which a man takes the position of the "Thinker" statue while masturbating with the forearm or elbow.
Example:
I saw some pictures of a hot girl on my computer but I was in my cubicle so I had to give myself a thinker.
I saw some pictures of a hot girl on my computer but I was in my cubicle so I had to give myself a thinker.