shit a six 

A huge shit. (Origin is from when you take a really big dump and in curls up in the toliet into a 6.)

"Hey guys i'll be right back, i'm about to go shit a six."

shit a six by TheHoodDwella February 10, 2008

shit over a six rail fence 

This would mean you have to shit really bad. So bad that you could shit over the top rail of a six rail fence which would be 9 feet or so.

Man after eating lunch from the mexican roach coach I fell like I could shit over a six rail fence .

shit over a six rail fence by B warden April 1, 2007

sixty pounds of shit in a fifty pound bag 

Wearing clothes too small, being too heavy for your clothes

Man...look at that 300 pound woman is size 5 jeans. She looks like sixty pounds of shit in a fifty pound bag.

Dammit, I'm getting too fat for my clothes. i feel like sixty pounds of shit in a forty pound bag

sixty pounds of shit in a fifty pound bag by Zadok the beast February 27, 2009