Masterjobbing
Masturbating while someone else gives you a handjob. Note: In order to not be gay, assistant's hand needs to be on top.
Your sexy roommate is masturbating, you lend him a hand thus performing the masterjobbing maneuver.
masterjob
when two people are hold hands and a man sticks his penis sticks hand in between their hands so its like masterbation/a handjob
Jim and Tina were so just doing a masterjob