YOU SAID:
you are a chunky baby
INTO JAPANESE
あなたは分厚い赤ちゃんです
BACK INTO ENGLISH
You are a thick baby
INTO JAPANESE
あなたは太い赤ちゃんです
BACK INTO ENGLISH
You are a fat baby
INTO JAPANESE
あなたは太った赤ちゃんです
BACK INTO ENGLISH
You are a fat baby
That didn't even make that much sense in English.