blister fister 

Taking a lit cigarette and burning the rim of the anus. As the blisters appear you pop them with a forward motion of the fist using the pus as lubricant for easy insertion.

My butt is so sore after a blister fister

blister fister by Goodaz April 25, 2011

fister blister 

when you fist a girl so hard she gets a blister on her vagina which you call a fister blister

Sarah was being a bitch so I gave her the fister blister

fister blister by Hiawatha November 12, 2006