F1 Finish
the Money shot at the end of a Porn sequence where 3 guys 'arrive' at the same time all over one (or more) chicks (or guy) by emptying their cocks- in a similar way to the Podium finish of a Grand Prix race
".... and so at the end of the '75 Swedish Grand Prix all that remains is for Emerson, Mario and James to get hold of the Jereboams and drench the adoring fans and each other with champagne for a proper F1 Finish"