IN his first political speech since heart and gallbladder sur gery, Ed Koch dropped the F-bomb on a crowd of Leslie Crocker Snyder supporters, The Post’s Jennifer Fer mino reports. At the break- fast fund-raiser, which raked in $200,000 for Snyder’s campaign for Manhattan dis trict attorney, the former mayor had the crowd at the Grand Hyatt howl ing with the story of his first trip to the su permarket after leaving office. Koch said dozens of citizens came up to thank him for his service — except one, who snarled, “You were a terrible mayor!” “And I say to him: ‘[Bleep] you!’ “