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.
"Bro, my ass is awfully dry today"

"It's ok bro, me and the boys are doing a Trans-Atlantic Pipeline tonight, you should join us"
by Canadians3h November 1, 2019
Get the Trans-Atlantic Pipeline mug.