Lyric discussion by JayAmari 

Cover art for Piggy lyrics by Nine Inch Nails

Another great example of Trent putting his anguish into words. I interpret this song as Trent speaking to a lover that left him, irrevocably hurting him.

“hey pig yeah you hey pig piggy pig pig pig all of my fears came true”

He is simply addressing the person that hurt him and saying how what he had hoped would never happen, has happened.

“black and blue and broken bones you left me here all alone my little piggy needed something new”

He is saying here I am in all this pain after you betrayed/left me. She left him for someone she met.

“nothing can stop me now 'cause I don't care anymore nothing can stop me now 'cause I don't care nothing can stop me now 'cause I don't care anymore nothing can stop me now 'cause I just don't care”

It is unknown that he is going to do (move on, kill her, lift weights, etc…), but her decision making provided the fuel he needed to fulfill his determination.

“hey pig nothing's turning out the way I planned” His future plans involved her, but she had other plans.

“hey pig there's a lot of things I hoped you could help me understand”

He is lost without her.

“what am I supposed to do? I lost my shit because of you”

Not only is he lost, but he gave up all he had (friends, time, etc..) and has nothing to show for it