(Just hopping in to say, linguists do not call a trans-Atlantic accent a mid-Atlantic accent, which is a specific local dialect in the Baltimore / Philly area - this sounds like someone accidentally conflating the two)

I appreciate the clarification! Wikipedia ALSO calls the trans-Atlantic accent the mid-Atlantic accent, so I'm guessing the conflation has been around for a while.

Just ask them to say "motor oil" or "going down to the ocean"