YOU SAID:

My pants have loads of poo in them, from lots of poops and times I couldn't hold it any longer

INTO JAPANESE

私のズボンにはたくさんのうんちが入っていて、たくさんのうんちがあり、もうそれを保持できなくなったときから

BACK INTO ENGLISH

I have a lot of poop in my pants, a lot of poop, since I can't hold it anymore

INTO JAPANESE

私はズボンにたくさんのうんちを持っています、もうそれを保持することができないのでたくさんのうんちがあります

BACK INTO ENGLISH

I have a lot of poop on my pants, I have a lot of poop because I can't hold it anymore

INTO JAPANESE

ズボンにうんちがたくさんあります。もう我慢できないのでうんちがたくさんあります。

BACK INTO ENGLISH

I have a lot of poop on my pants. I can't stand it anymore, so I have a lot of poop.

INTO JAPANESE

ズボンにうんちがたくさんあります。もう我慢できないので、うんちがたくさんあります。

BACK INTO ENGLISH

I have a lot of poop on my pants. I can't stand it anymore, so I have a lot of poop.