poop ass pants

Sweatpants that have become too worn out making the ass sag and giving the illusion of having a load of shit in them

Carol should retire her Victoria Secret {sweatpants}, she's got some poop ass pants going on, and there's nothing 'sexy' about that.

or

(At the ice skating rink with ya boyz) That lady would have it going on if she would quit trying to {pop and lock} it in her poop ass pants, it looks like her ass hangs down to her knees!