Slang originating from southern
Iowa meaning to jump someone with one or more accomplices and then
kicking or smushing your foot onto their
mouth/teeth as hard as possible as the other person(s) holds them down.
Person 1: Bro, did you hear about Jack and
Haley graining Josh yesterday?
Person 2:
Yeah, I heard he won't be able to speak normally ever again,
dude.