When preforming vaginal and anal sex, the shit when preforming anal sex gets schmeared and or stuck to the penis or foreign object. Pumpkin butter is formed when after fucked in vagina and anal cavity and brown white substance that forms is called pumpkin butter.
Me and Sara had a lot of sex last night, she's a freak and did anal. There was a lot of pumpkin butter.
The sexual act of rubbing butter in a female partner's genitals (preferably one of your cousins or sisters), having her urinate it back into your mouth, then regurgitating it back into her anus and using it as anal lubricant
"Hey dude last night I did an Alabama butter churn with my sis"
"This is why we don't talk anymore you sick fuck"
Poo Butter is the nasty gelatinous fluid that forms under the folds of a fat ladies titties on an extremely hot day. The sweat runs down and collects in the dark cooler folds of skin and congeals into a texture similar to cooled bacon grease thereby becoming poo butter.
Mabel, make sure you lift up both titties and wash all the poo butter out from underneath them