The act of giving someone an imaginary hand job. This is done by shaking a a closed fist in the air, simulating a stroking action. This action is used for a wide variety of reasons, whether it is for raising morale, thanking someone, or congratulating someone. It is in no way wrong for one man to give another a notional hand job, because the it's notional, and not real. Either sex can give either sex a notional hand job.
"I gave my friend a ride home and since he did not have gas money, he returned the favor by giving me a notional hand job."