poking cotton 

Ok, its when you got to take a shit so bad that the turd is already emerging from your asshole and the end of it is poking into your cotton underwear. Also know as browncappin.

1) Man, I got to get off the phone.....I'm poking cotton.

2) I didn't shit for a whole week but after I ate them tacos I was poking cotton.

poking cotton by Ezeerider July 26, 2005

Pokin' cotton 

When you have take a crap so bad it starts commin' out before you make it to the toilet/water closet and you can feel the turd pushin' against your underwear.

Man I gotta shit so bad I'm already pokin' cotton.

Pokin' cotton by T. Erdelyi June 18, 2007