YOU SAID:

i did a big poo in my office bin

INTO JAPANESE

私はオフィスの大箱で大きなうんちをしました

BACK INTO ENGLISH

I had a big poop in the office bin

INTO JAPANESE

私はオフィスの大箱で大きなうんちを持っていました

BACK INTO ENGLISH

I had a big poop in the office bin