YOU SAID:
I'm about to pee my pants
INTO JAPANESE
ズボンをおしっこしようとしてる
BACK INTO ENGLISH
I'm trying to pee on my pants
INTO JAPANESE
おしっこ漏れそう!
BACK INTO ENGLISH
I'm going to pee my pants!
INTO JAPANESE
おしっこ漏れそう!
BACK INTO ENGLISH
I'm going to pee my pants!
You've done this before, haven't you.