The lyrics are a clear reference to Psycho, where the main character, Norman Bates, after years of torment from his mother, kills her and her lover, and keeps her body in the fruit cellar.
Stubborn old, worthless hag
Simply had nothing to give
I couldn't stand your eternal nag
You didn't deserve to live
So I went to the stove and took a pork knife
And stabbed it into your head
Buried you in the fruit cellar
I was glad 'cause I thought you were dead
But the maggots didn't feast on your body
You didn't get moldy as I thought
And still I can hear that nag in my head
You were supposed to rot
Supposed to Rot
Now she haunts me, day and night
A haunting I can't forget
The deed was a coldblooded homicide
A murder I regret
But still she's the same old hag
And still my life has turned the same
Isn't there anything to set me free
From this wicked pain?
You were supposed to rot
Supposed to Rot was written by Ulf Cederlund & Alex Hellid & Nicke Andersson & Leif Cuzner.
Supposed to Rot was produced by Entombed & Tomas Skogsberg.
Entombed released Supposed to Rot on Mon Jun 04 1990.