Everyone knows what a blister is, but the suffix -er implies that is must do the preceding word, hence blist.
Blist- v. To severely hurt a living thing in any manner.
Blister- n. Anything that unavoidably hurts people.
Acceptable variations: Blisted and blisting.
"Oy, I'm going to straight blist ya, mate."
"Okay, okay! You're funny. Stop with the pinching you're blisting me."
"You have to put that dog down, he's a blister."