Smedley has it both personally and in the fund even though he does not comprehend the technology. When I saw the video I was disappointed in the use of propeller head. But then I google it and it is not so bad. . A propeller head (also spelled propellor head , and sometimes shortened to prop head or prophead ) is jargon for someone who is exceptionally, perhaps weirdly bright or knowledgeable, especially in some technical field. In computers, according to The New Hacker's Dictionary , it's a synonym for computer geek.