YOU SAID:
Yo what is up my motherfreaking brother!
INTO JAPANESE
お母さんのお兄ちゃんは何してるの
BACK INTO ENGLISH
What is your mother's brother doing?
INTO JAPANESE
あなたのお母さんの弟は何をしていますか?
BACK INTO ENGLISH
What is your mother's younger brother doing?
INTO JAPANESE
あなたのお母さんの弟は何をしていますか?
BACK INTO ENGLISH
What is your mother's younger brother doing?
That didn't even make that much sense in English.