Snooki's decision to sign on for Wrestlemania XXVII is pissing off ex WWE Diva Chyna -- and TMZ has learned she wants to settle the grudge in the ring.
TMZ spoke with Joanie Laurer -- a.k.a. Chyna -- who says, "Snooki is trying to make a joke out of wrestling" ... and needs to be taught a lesson.
Chyna hasn't wrestled since 2002, but says she'd come back for a Snooki smackdown -- and she's even up for a threesome ... adding, “I could take on Snooki AND The Situation in a tag match and have some fun doing it."
Apparently she hasn't seen Snooki's moves.