A Trans-Atlantic Pipeline is a sex act where multiple men line up in a standing position and stick their penis into the persons ass in front of them, then, proceed to piss and spread the "oil" down the pipeline.
+: We have so many rats in our dorms, and I have to pay some smuggler to adopt a cat??!!
-: I know the solution, the transcatlantic pipeline!
+: Oh knock it off, cats would claw and rupture the pipes!