YOU SAID:
hi what are you doing smelly poo
INTO JAPANESE
こんにちは、臭いうんちを何しているのですか
BACK INTO ENGLISH
Hello, what are you doing with your stinky poop?
INTO JAPANESE
こんにちは、臭いウンチで何してるの?
BACK INTO ENGLISH
Hello, what are you doing with that stinky poop?
INTO JAPANESE
こんにちは、臭いウンチで何してるの?
BACK INTO ENGLISH
Hello, what are you doing with that stinky poop?
That didn't even make that much sense in English.