Ah, because I used a translate app and wasn't sure if it did it correctly. So as I found the translation funny, I wasn't sure it was the same thing you were aiming at.
I can't think of anything close. The only thing I got is "rear...something" and "back...something". I don't think it's even a real word in Russian, but it does sound like one, and that's why it's funny (and it also describes ass).
задник is so hilarious from the perspective of Russian. xD
'backdrop'?
Why the question mark?
Ah, because I used a translate app and wasn't sure if it did it correctly. So as I found the translation funny, I wasn't sure it was the same thing you were aiming at.
I can't think of anything close. The only thing I got is "rear...something" and "back...something". I don't think it's even a real word in Russian, but it does sound like one, and that's why it's funny (and it also describes ass).