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a goodwill handshake is a handjob that is a more polite, or out of the goodness of your heart kinda sex act than, say, jerking off your boyfriend in the shower.

to be performed quietly in the backseat of a car, in a closet, or basement setting, the goodwill handshake can also be used as a way to say 'thank you' or 'good job'.
For our top 15 customers we offered goodwill handshakes in the basement as a way of showing our appreciation for the support of our cafe.
by tayintheway January 25, 2011