YOU SAID:

i got diarrhea in my pants

INTO JAPANESE

私はズボンで下痢をした

BACK INTO ENGLISH

I had diarrhea in my pants

INTO JAPANESE

ズボンに下痢があった

BACK INTO ENGLISH

Trousers had diarrhea

INTO JAPANESE

ズボンに下痢があった

BACK INTO ENGLISH

Trousers had diarrhea