YOU SAID:

i farted and did a doo doo in my pants

INTO JAPANESE

私はおならをしてズボンでドゥードゥーをしました

BACK INTO ENGLISH

I farted and dido duo in trousers

INTO JAPANESE

私はズボンでおならをして

BACK INTO ENGLISH

I fart with my pants

INTO JAPANESE

私はズボンでおなら

BACK INTO ENGLISH

I fart in pants

INTO JAPANESE

私はズボンでおなら

BACK INTO ENGLISH

I fart in pants