YOU SAID:

stop smelling my undies

INTO JAPANESE

下着のにおいがするのをやめなさい

BACK INTO ENGLISH

Stop smelling underwear

INTO JAPANESE

下着の臭いをやめる

BACK INTO ENGLISH

Stop the smell of underwear

INTO JAPANESE

下着の臭いを止めろ

BACK INTO ENGLISH

Stop the smell of underwear