YOU SAID:
I pooped in mah pants
INTO JAPANESE
私はマーパンツでうんち
BACK INTO ENGLISH
I'm pooping in mar pants
INTO JAPANESE
マーパンツでうんち
BACK INTO ENGLISH
Poop with mar pants
INTO JAPANESE
マーパンツ付きうんち
BACK INTO ENGLISH
Poop with mar pants
That didn't even make that much sense in English.