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An Atlantian Oil Slick is an aquatic anal sex act. To perform an Atlantian Oil Slick one must either eat, or have their partner eat intentionally greasy/oily food for at least 72 hours before anal intercourse. A successful Atlantian Oil Slick is only possible when you pull out & there is visible oil spotted in the water.
Person 1 - "How was the pool?"

Person 2 - "It was great until we got kicked out."
Person 1 - "Why'd you get kicked out?"
Person 2 - "My girl & I got did an Atlantian Oil Slick where no one could see us, but there was so much oil that it gave us away."
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by MissAnathema June 05, 2018
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