Tarzoon: Shame of the Jungle (1975)
Tarzoon: Shame of the Jungle is a 1975 adult-oriented French/Belgian animated film directed by cartoonist Picha and Boris Szulzinger. The film was the first foreign-animated film to receive both an X rating and wide distribution in the United States. This film is also known as Jungle Burger in the United Kingdom.
More at Wikipedia.