50. Shaft in Africa (1973)
Director: John Guillerman
Stars: Richard Roundtree, Frank Finlay, Vonetta McGee
The trademarked line may have originated two years earlier, but Shaft didn't really become a bad mother...until this third installment, when he went on a international adventure to stop a modern-day slave trading operation. We could have done without all the ignorance about Africa, but at least Samuel L. Jackson wasn't in it.