butsudan gaeshi.
botsudan. means Buddhist altar in English.
Many Japanese homes have altars, and although Japanese people are not aware of it, they are a deeply religious people.
gaeshi. means to flip over.
So I think, flip the altar over. would be fine.
It's a fairly well-known name for a sexual position.
Now, as for the position, it's a type of doggy style.
The man inserts his penis from behind while the woman is on all fours with her arms outstretched.
It feels like a deeper insertion, and both men and women can use their hips more freely than in regular doggy style.
It's also a masochistic pose for women, so it particularly arouses feelings of shame.