It means Se vs. Si or something.
Gravy Train
Gravy Boat
It means Se vs. Si or something.
gravy train makes me think of relentless bukake.
Gravy Train.
I think I associate Boats more with Love, even though I think Trains are more romantic than Boats, even though most local trains are terrible. Although I'm more likely to be sick on a Boat, so maybe Love Boats are indeed more appropriate.
Gravy Taxi, please.
Neither. I prefer Gravy Spaceship (having money fall from the sky and I can teleport everywhere in an invisible mode).